diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 85d7c2d6d..5556e92cc 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -136,13 +136,13 @@ jobs:
         sudo Xvfb -ac :99 -screen 0 1280x1024x24 > /dev/null 2>&1 & # optional
 
     - name: "Run PHPUnit tests"
-      if: ${{ matrix.drupal-core != '9.5.x' || matrix.php-version != '8.1' }}
+      if: ${{ matrix.drupal-core != '10.1.x' || matrix.php-version != '8.1' }}
       run: |
         cd drupal
         vendor/bin/phpunit -c core --verbose --color --group apigee_edge --testsuite unit,kernel,functional,functional-javascript modules/contrib/apigee_edge
 
     - name: "Run PHPUnit tests with Code Coverage"
-      if: ${{ matrix.drupal-core == '9.5.x' && matrix.php-version == '8.1' }}
+      if: ${{ matrix.drupal-core == '10.1.x' && matrix.php-version == '8.1' }}
       run: |
         cd drupal
         cp modules/contrib/apigee_edge/phpunit.core.xml.dist core/phpunit.xml
@@ -156,7 +156,7 @@ jobs:
         path: drupal/sites/simpletest/browser_output/*
 
     - name: Upload coverage to Codecov
-      if: ${{ matrix.drupal-core == '9.5.x' && matrix.php-version == '8.1' }}
+      if: ${{ matrix.drupal-core == '10.1.x' && matrix.php-version == '8.1' }}
       uses: codecov/codecov-action@v3
       with:
         files: /tmp/coverage_${{ matrix.instance-type }}.xml
diff --git a/src/Command/CommandBase.php b/src/Command/CommandBase.php
deleted file mode 100644
index 941d56da6..000000000
--- a/src/Command/CommandBase.php
+++ /dev/null
@@ -1,129 +0,0 @@
-<?php
-
-/**
- * Copyright 2018 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-namespace Drupal\apigee_edge\Command;
-
-@trigger_error('The ' . __NAMESPACE__ . '\CommandBase is deprecated in apigee_edge:3.0.4 and is removed from apigee_edge:3.1.0. Drupal/console is not compatible with Drupal 10. See https://github.com/apigee/apigee-edge-drupal/issues/984', E_USER_DEPRECATED);
-
-use Drupal\apigee_edge\CliServiceInterface;
-use Drupal\Console\Core\Command\Command;
-use Drupal\Console\Core\Command\Shared\CommandTrait;
-use Drupal\Console\Core\Style\DrupalStyle;
-use Drupal\Core\Logger\LoggerChannelFactoryInterface;
-use Drupal\Core\Logger\LogMessageParserInterface;
-use Symfony\Component\Console\Input\InputInterface;
-use Symfony\Component\Console\Logger\ConsoleLogger;
-use Symfony\Component\Console\Output\OutputInterface;
-use Symfony\Component\Console\Style\StyleInterface;
-
-/**
- * Class CommandBase for shared functionality.
- *
- * @deprecated in apigee_edge:3.0.4 and is removed from apigee_edge:3.1.0.
- *  Drupal/console is not compatible with Drupal 10.
- *
- * @see https://github.com/apigee/apigee-edge-drupal/issues/984
- */
-abstract class CommandBase extends Command {
-
-  use CommandTrait;
-
-  /**
-   * The interoperability cli service.
-   *
-   * @var \Drupal\apigee_edge\CliServiceInterface
-   */
-  protected $cliService;
-
-  /**
-   * The IO interface composed of a commands input and output.
-   *
-   * @var \Symfony\Component\Console\Style\StyleInterface
-   */
-  protected $io;
-
-  /**
-   * The parser object.
-   *
-   * @var \Drupal\Core\Logger\LogMessageParserInterface
-   */
-  protected $logMessageParser;
-
-  /**
-   * The logger channel factory.
-   *
-   * @var \Drupal\Core\Logger\LoggerChannelFactoryInterface
-   */
-  protected $loggerChannelFactory;
-
-  /**
-   * Constructor with cli service injection.
-   *
-   * @param \Drupal\apigee_edge\CliServiceInterface $cli_service
-   *   The cli service to delegate all actions to.
-   * @param \Drupal\Core\Logger\LogMessageParserInterface $log_message_parser
-   *   The parser to use when extracting message variables.
-   * @param \Drupal\Core\Logger\LoggerChannelFactoryInterface $logger_channel_factory
-   *   The logger channel factory.
-   */
-  public function __construct(CliServiceInterface $cli_service, LogMessageParserInterface $log_message_parser, LoggerChannelFactoryInterface $logger_channel_factory) {
-    parent::__construct();
-    $this->cliService = $cli_service;
-    $this->logMessageParser = $log_message_parser;
-    $this->loggerChannelFactory = $logger_channel_factory;
-  }
-
-  /**
-   * Sets up the IO interface.
-   *
-   * @param \Symfony\Component\Console\Input\InputInterface $input
-   *   The input interface.
-   * @param \Symfony\Component\Console\Output\OutputInterface $output
-   *   The output interface.
-   */
-  protected function setupIo(InputInterface $input, OutputInterface $output) {
-    $this->io = new DrupalStyle($input, $output);
-    $this->setupLogger($output);
-  }
-
-  /**
-   * Sets up the logger service.
-   *
-   * The service redirects Drupal logging messages to the console output.
-   *
-   * @param \Symfony\Component\Console\Output\OutputInterface $output
-   *   The output interface.
-   */
-  protected function setupLogger(OutputInterface $output) {
-    $drupal_console_logger = new ConsoleLogger($output);
-    $logger = new DrupalConsoleLog($this->logMessageParser, $drupal_console_logger);
-    $this->loggerChannelFactory->addLogger($logger);
-  }
-
-  /**
-   * Gets the IO interface.
-   *
-   * @return \Symfony\Component\Console\Style\StyleInterface
-   *   The IO interface.
-   */
-  public function getIo(): StyleInterface {
-    return $this->io;
-  }
-
-}
diff --git a/src/Command/CreateEdgeRoleCommand.php b/src/Command/CreateEdgeRoleCommand.php
deleted file mode 100644
index 0e74c35c0..000000000
--- a/src/Command/CreateEdgeRoleCommand.php
+++ /dev/null
@@ -1,116 +0,0 @@
-<?php
-
-/**
- * Copyright 2019 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-namespace Drupal\apigee_edge\Command;
-
-use Symfony\Component\Console\Input\InputArgument;
-use Symfony\Component\Console\Input\InputInterface;
-use Symfony\Component\Console\Input\InputOption;
-use Symfony\Component\Console\Output\OutputInterface;
-
-/**
- * Developer synchronization command class for Drupal Console.
- *
- * @Drupal\Console\Annotations\DrupalCommand (
- *     extension="apigee_edge",
- *     extensionType="module"
- * )
- *
- * @deprecated in apigee_edge:3.0.4 and is removed from apigee_edge:3.1.0.
- *  Drupal/console is not compatible with Drupal 10.
- *
- * @see https://github.com/apigee/apigee-edge-drupal/issues/984
- * @phpstan-ignore-next-line
- */
-class CreateEdgeRoleCommand extends CommandBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function configure() {
-    $this
-      ->setName('apigee_edge:role:create')
-      ->setDescription($this->trans('commands.apigee_edge.role.create.description'))
-      ->setHelp('commands.apigee_edge.role.create.help')
-      ->addArgument(
-        'org',
-        InputArgument::REQUIRED,
-        $this->trans('commands.apigee_edge.role.create.arguments.org')
-      )
-      ->addArgument(
-        'email',
-        InputArgument::REQUIRED,
-        $this->trans('commands.apigee_edge.role.create.arguments.email')
-      )
-      ->addOption(
-        'password',
-        'p',
-        InputArgument::OPTIONAL,
-        $this->trans('commands.apigee_edge.role.create.options.password')
-      )
-      ->addOption(
-        'base-url',
-        'b',
-        InputArgument::OPTIONAL,
-        $this->trans('commands.apigee_edge.role.create.options.base-url')
-      )
-      ->addOption(
-        'role-name',
-        'r',
-        InputArgument::OPTIONAL,
-        $this->trans('commands.apigee_edge.role.create.options.role-name')
-      )->addOption(
-        'force',
-        'f',
-        InputOption::VALUE_NONE,
-        $this->trans('commands.apigee_edge.role.create.options.force')
-      );
-
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function interact(InputInterface $input, OutputInterface $output) {
-    $this->setupIo($input, $output);
-    $password = $input->getOption('password');
-    if (!$password) {
-      $password = $this->getIo()->askHidden(
-        $this->trans('commands.apigee_edge.role.create.questions.password')
-      );
-      $input->setOption('password', $password);
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function execute(InputInterface $input, OutputInterface $output) {
-    $this->setupIo($input, $output);
-    $org = $input->getArgument('org');
-    $email = $input->getArgument('email');
-    $password = $input->getOption('password');
-    $base_url = $input->getOption('base-url');
-    $role_name = $input->getOption('role-name');
-    $force = $input->getOption('force');
-
-    $this->cliService->createEdgeRoleForDrupal($this->getIo(), 't', $org, $email, $password, $base_url, $role_name, $force);
-  }
-
-}
diff --git a/src/Command/DeveloperSyncCommand.php b/src/Command/DeveloperSyncCommand.php
deleted file mode 100644
index c07a3bf3e..000000000
--- a/src/Command/DeveloperSyncCommand.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-
-/**
- * Copyright 2018 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-namespace Drupal\apigee_edge\Command;
-
-use Symfony\Component\Console\Input\InputInterface;
-use Symfony\Component\Console\Output\OutputInterface;
-
-/**
- * Developer synchronization command class for Drupal Console.
- *
- * @Drupal\Console\Annotations\DrupalCommand (
- *     extension="apigee_edge",
- *     extensionType="module"
- * )
- *
- * @deprecated in apigee_edge:3.0.4 and is removed from apigee_edge:3.1.0.
- *  Drupal/console is not compatible with Drupal 10.
- *
- * @see https://github.com/apigee/apigee-edge-drupal/issues/984
- * @phpstan-ignore-next-line
- */
-class DeveloperSyncCommand extends CommandBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function configure() {
-    $this
-      ->setName('apigee_edge:sync')
-      ->setDescription($this->trans('commands.apigee_edge.sync.description'));
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function execute(InputInterface $input, OutputInterface $output) {
-    $this->setupIo($input, $output);
-    $this->cliService->sync($this->getIo(), 't');
-  }
-
-}
diff --git a/src/Command/DrupalConsoleLog.php b/src/Command/DrupalConsoleLog.php
deleted file mode 100644
index ea4322fed..000000000
--- a/src/Command/DrupalConsoleLog.php
+++ /dev/null
@@ -1,106 +0,0 @@
-<?php
-
-/**
- * Copyright 2018 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-namespace Drupal\apigee_edge\Command;
-
-use Drupal\Core\Logger\LogMessageParserInterface;
-use Drupal\Core\Logger\RfcLoggerTrait;
-use Drupal\Core\Logger\RfcLogLevel;
-use Psr\Log\LoggerInterface;
-use Psr\Log\LogLevel;
-
-/**
- * Redirects Drupal logging messages to Drupal Console log.
- *
- * @deprecated in apigee_edge:3.0.4 and is removed from apigee_edge:3.1.0.
- *  Drupal/console is not compatible with Drupal 10.
- *
- * @see https://github.com/apigee/apigee-edge-drupal/issues/984
- */
-class DrupalConsoleLog implements LoggerInterface {
-
-  use RfcLoggerTrait;
-
-  /**
-   * The message's placeholders parser.
-   *
-   * @var \Drupal\Core\Logger\LogMessageParserInterface
-   */
-  protected $logMessageParser;
-
-  /**
-   * The logger that messages will be passed through to.
-   *
-   * @var \Psr\Log\LoggerInterface
-   */
-  protected $logger;
-
-  /**
-   * Constructs a DrupalConsoleLog object.
-   *
-   * @param \Drupal\Core\Logger\LogMessageParserInterface $log_message_parser
-   *   The parser to use when extracting message variables.
-   * @param \Psr\Log\LoggerInterface $logger
-   *   The logger instance.
-   */
-  public function __construct(LogMessageParserInterface $log_message_parser, LoggerInterface $logger) {
-    $this->logMessageParser = $log_message_parser;
-    $this->logger = $logger;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function log($level, $message, array $context = []) {
-    switch ($level) {
-      case RfcLogLevel::ERROR:
-        $error_type = LogLevel::ERROR;
-        break;
-
-      case RfcLogLevel::WARNING:
-        $error_type = LogLevel::WARNING;
-        break;
-
-      case RfcLogLevel::DEBUG:
-        $error_type = LogLevel::DEBUG;
-        break;
-
-      case RfcLogLevel::INFO:
-        $error_type = LogLevel::INFO;
-        break;
-
-      case RfcLogLevel::NOTICE:
-        $error_type = LogLevel::NOTICE;
-        break;
-
-      default:
-        $error_type = $level;
-        break;
-    }
-
-    $message_placeholders = $this->logMessageParser->parseMessagePlaceholders($message, $context);
-    $message_placeholders = array_filter($message_placeholders, function ($element) {
-      return is_scalar($element) || is_callable([$element, '__toString']);
-    });
-    $message = empty($message_placeholders) ? $message : strtr($message, $message_placeholders);
-
-    $this->logger->log($error_type, $message, $context);
-  }
-
-}
diff --git a/tests/src/Unit/Command/CreateEdgeRoleCommandTest.php b/tests/src/Unit/Command/CreateEdgeRoleCommandTest.php
deleted file mode 100644
index 8ffd42b88..000000000
--- a/tests/src/Unit/Command/CreateEdgeRoleCommandTest.php
+++ /dev/null
@@ -1,243 +0,0 @@
-<?php
-
-/**
- * Copyright 2019 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-namespace Drupal\Tests\apigee_edge\Unit\Command {
-
-  use Drupal\apigee_edge\CliServiceInterface;
-  use Drupal\apigee_edge\Command\CreateEdgeRoleCommand;
-  use Drupal\Console\Core\Style\DrupalStyle;
-  use Drupal\Core\Logger\LoggerChannelFactoryInterface;
-  use Drupal\Core\Logger\LogMessageParserInterface;
-  use Drupal\Tests\UnitTestCase;
-  use Prophecy\Argument;
-  use Prophecy\Prophet;
-  use Symfony\Component\Console\Formatter\OutputFormatterInterface;
-  use Symfony\Component\Console\Input\InputInterface;
-  use Symfony\Component\Console\Output\OutputInterface;
-
-  /**
-   * Test ApigeeEdgeCommands class.
-   *
-   * @group apigee_edge
-   *
-   * @group legacy
-   */
-  class CreateEdgeRoleCommandTest extends UnitTestCase {
-
-    /**
-     * The system under test.
-     *
-     * @var \Drupal\apigee_edge\Command\CreateEdgeRoleCommand
-     */
-    protected $createEdgeRoleCommand;
-
-    /**
-     * The CLI Service mock.
-     *
-     * @var \Prophecy\Prophecy\ObjectProphecy
-     */
-    protected $cliService;
-
-    /**
-     * The IO mock.
-     *
-     * @var \Prophecy\Prophecy\ObjectProphecy
-     */
-    protected $io;
-
-    /**
-     * The LogMessageParser mock.
-     *
-     * @var \Prophecy\Prophecy\ObjectProphecy
-     */
-    protected $logMessageParser;
-
-    /**
-     * The LoggerChannelFactory mock.
-     *
-     * @var \Prophecy\Prophecy\ObjectProphecy
-     */
-    protected $loggerChannelFactory;
-
-    /**
-     * The InputInterface mock.
-     *
-     * @var \Prophecy\Prophecy\ObjectProphecy
-     */
-    private $input;
-
-    /**
-     * The OutputInterface mock.
-     *
-     * @var \Prophecy\Prophecy\ObjectProphecy
-     */
-    private $output;
-
-    /**
-     * OutputFormatterInterface mock.
-     *
-     * @var \Prophecy\Prophecy\ObjectProphecy
-     */
-    private $outputFormatter;
-
-    /**
-     * The Prophet class.
-     *
-     * @var \Prophecy\Prophet
-     */
-    private $prophet;
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function setUp(): void {
-      if (!class_exists('Drupal\Console\Core\Command\Command')) {
-        $this->markTestSkipped('Skipping because Drupal Console is not installed.');
-      }
-
-      parent::setUp();
-      $this->prophet = new Prophet();
-      $this->cliService = $this->prophet->prophesize(CliServiceInterface::class);
-      $this->logMessageParser = $this->prophet->prophesize(LogMessageParserInterface::class);
-      $this->loggerChannelFactory = $this->prophet->prophesize(LoggerChannelFactoryInterface::class);
-      $this->createEdgeRoleCommand = new CreateEdgeRoleCommand($this->cliService->reveal(),
-        $this->logMessageParser->reveal(), $this->loggerChannelFactory->reveal());
-
-      $this->input = $this->prophet->prophesize(InputInterface::class);
-      $this->output = $this->prophet->prophesize(OutputInterface::class);
-      $this->io = $this->prophet->prophesize(DrupalStyle::class);
-
-      $this->outputFormatter = $this->prophet->prophesize(OutputFormatterInterface::class)->reveal();
-      $this->output->getFormatter()->willReturn($this->outputFormatter);
-      $this->output->getVerbosity()->willReturn(OutputInterface::VERBOSITY_DEBUG);
-    }
-
-    /**
-     * Calls to Drush command should pass through to CLI service.
-     */
-    public function testCreateEdgeRole() {
-      $this->input->getArgument(Argument::type('string'))->willReturn('XXX');
-      $this->input->getOption(Argument::type('string'))->willReturn('XXX');
-
-      $this->createEdgeRoleCommand->execute($this->input->reveal(), $this->output->reveal());
-
-      $this->cliService->createEdgeRoleForDrupal(
-        Argument::type(DrupalStyle::class),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('bool')
-      )->shouldHaveBeenCalledTimes(1);
-    }
-
-    /**
-     * Calls to Drush command should pass through to CLI service.
-     */
-    public function testCreateEdgeRoleForceParam() {
-      $this->input->getArgument(Argument::is('org'))->willReturn('myorg');
-      $this->input->getArgument(Argument::is('email'))->willReturn('email@example.com');
-      $this->input->getOption(Argument::is('password'))->willReturn('secret');
-      $this->input->getOption(Argument::is('base-url'))->willReturn('http://base-url');
-      $this->input->getOption(Argument::is('role-name'))->willReturn('custom_drupal_role');
-      $this->input->getOption(Argument::is('force'))->willReturn('true');
-
-      $this->createEdgeRoleCommand->execute($this->input->reveal(), $this->output->reveal());
-
-      $this->cliService->createEdgeRoleForDrupal(
-        Argument::type(DrupalStyle::class),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('string'),
-        Argument::type('bool')
-      )->shouldHaveBeenCalledTimes(1);
-    }
-
-    /**
-     * Test validateCreateEdgeRole function does not prompt for password.
-     *
-     * When password option is set, do not prompt for password.
-     */
-    public function testInteractWithPasswordParam() {
-
-      $this->input->getArgument(Argument::type('string'))->willReturn('XXX');
-      $this->input->getOption('password')->willReturn('secret');
-      $this->input->getOption(Argument::type('string'))->willReturn('XXX');
-      $this->input->isInteractive()->willReturn(FALSE);
-
-      $this->createEdgeRoleCommand->interact($this->input->reveal(), $this->output->reveal());
-
-      // Interact should not change password since it was passed in.
-      $this->input->getOption('password')->shouldHaveBeenCalled();
-      $this->input->setOption('password')->shouldNotHaveBeenCalled();
-    }
-
-    /**
-     * Test validateCreateEdgeRole prompts for password.
-     *
-     * When password option not set, password should be inputted by user.
-     */
-    public function testInteractPasswordParamEmpty() {
-
-      $this->input->getArgument(Argument::type('string'))->willReturn('XXX');
-      $this->input->getOption('password')->willReturn(NULL);
-      $this->input->getOption(Argument::type('string'))->willReturn('XXX');
-      $this->input->setOption(Argument::type('string'), NULL)->willReturn(NULL);
-      $this->input->isInteractive()->willReturn(FALSE);
-
-      $this->createEdgeRoleCommand->interact($this->input->reveal(), $this->output->reveal());
-
-      // Interact should not change password since it was passed in.
-      $this->input->getOption('password')->shouldHaveBeenCalled();
-      $this->input->setOption('password', NULL)->shouldHaveBeenCalled();
-    }
-
-  }
-}
-
-namespace {
-
-  // phpcs:disable PSR2.Namespaces.UseDeclaration.UseAfterNamespace
-  use Drush\Utils\StringUtils;
-
-  if (!function_exists('t')) {
-
-    /**
-     * Mock out t() so function exists for tests.
-     *
-     * @param string $message
-     *   The string with placeholders to be interpolated.
-     * @param array $context
-     *   An associative array of values to be inserted into the message.
-     *
-     * @return string
-     *   The resulting string with all placeholders filled in.
-     */
-    function t(string $message, array $context = []): string {
-      return StringUtils::interpolate($message, $context);
-    }
-
-  }
-
-}