How to Create Email Document with Mutation

[ximAABacon]

I am trying to create a Email Document with the following mutation

mutation {
  createDocumentEmail(
    key: "newmaildocument",
    parentId:1,
    input: {
    	from: "from@bla.com"
      elements : {        
        wysiwyg: {
          _editableName: "greeting_text"
          text: "<p>Hello</p>"
        }
      }
   	}  
  ) {
    success
  }
}

But i get the following error:

{
  "errors": [
    {
      "message": "Internal server error",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "createDocumentEmail"
      ],
      "extensions": {
        "debugMessage": "Call to undefined method setElements in class Pimcore\\Model\\Document\\Email",
        "file": "/var/www/html/vendor/pimcore/pimcore/lib/Model/AbstractModel.php",
        "line": 226,
        "trace": [
          {
            "file": "/var/www/html/vendor/pimcore/data-hub/src/GraphQL/Mutation/MutationType.php",
            "line": 442,
            "call": "Pimcore\\Model\\AbstractModel::__call('setElements', array(1))"
          },
          {
            "file": "/var/www/html/vendor/pimcore/data-hub/src/GraphQL/Mutation/MutationType.php",
            "line": 408,
            "call": "Pimcore\\Bundle\\DataHubBundle\\GraphQL\\Mutation\\MutationType::processDocumentPageMutationInput(array(1), array(3), array(2), instance of GraphQL\\Type\\Definition\\ResolveInfo, instance of Pimcore\\Model\\Document\\Email, array(9))"
          },
          {
            "file": "/var/www/html/vendor/pimcore/data-hub/src/GraphQL/Mutation/MutationType.php",
            "line": 273,
            "call": "Pimcore\\Bundle\\DataHubBundle\\GraphQL\\Mutation\\MutationType::processDocumentEmailMutationInput(array(0), array(3), array(2), instance of GraphQL\\Type\\Definition\\ResolveInfo, instance of Pimcore\\Model\\Document\\Email, array(9))"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/Executor/ReferenceExecutor.php",
            "line": 766,
            "call": "Pimcore\\Bundle\\DataHubBundle\\GraphQL\\Mutation\\MutationType::Pimcore\\Bundle\\DataHubBundle\\GraphQL\\Mutation\\{closure}(array(0), array(3), array(2), instance of GraphQL\\Type\\Definition\\ResolveInfo)"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/Executor/ReferenceExecutor.php",
            "line": 674,
            "call": "GraphQL\\Executor\\ReferenceExecutor::resolveFieldValueOrError(instance of GraphQL\\Type\\Definition\\FieldDefinition, instance of GraphQL\\Language\\AST\\FieldNode, instance of Closure, array(2), array(0), instance of GraphQL\\Type\\Definition\\ResolveInfo, array(2))"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/Executor/ReferenceExecutor.php",
            "line": 561,
            "call": "GraphQL\\Executor\\ReferenceExecutor::resolveField(GraphQLType: Mutations, array(0), instance of ArrayObject(1), 'createDocumentEmail', array(1), array(1), array(2))"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/Executor/ReferenceExecutor.php",
            "line": 1007,
            "call": "GraphQL\\Executor\\ReferenceExecutor::GraphQL\\Executor\\{closure}(array(0), 'createDocumentEmail')"
          },
          {
            "call": "GraphQL\\Executor\\ReferenceExecutor::GraphQL\\Executor\\{closure}(array(0), 'createDocumentEmail')"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/Executor/ReferenceExecutor.php",
            "line": 999,
            "function": "array_reduce(array(1), instance of Closure, array(0))"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/Executor/ReferenceExecutor.php",
            "line": 555,
            "call": "GraphQL\\Executor\\ReferenceExecutor::promiseReduce(array(1), instance of Closure, array(0))"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/Executor/ReferenceExecutor.php",
            "line": 318,
            "call": "GraphQL\\Executor\\ReferenceExecutor::executeFieldsSerially(GraphQLType: Mutations, array(0), array(0), array(0), instance of ArrayObject(1), array(2))"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/Executor/ReferenceExecutor.php",
            "line": 258,
            "call": "GraphQL\\Executor\\ReferenceExecutor::executeOperation(instance of GraphQL\\Language\\AST\\OperationDefinitionNode, array(0))"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/Executor/Executor.php",
            "line": 184,
            "call": "GraphQL\\Executor\\ReferenceExecutor::doExecute()"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/GraphQL.php",
            "line": 163,
            "call": "GraphQL\\Executor\\Executor::promiseToExecute(instance of GraphQL\\Executor\\Promise\\Adapter\\SyncPromiseAdapter, instance of GraphQL\\Type\\Schema, instance of GraphQL\\Language\\AST\\DocumentNode, array(0), array(2), array(0), null, null)"
          },
          {
            "file": "/var/www/html/vendor/webonyx/graphql-php/src/GraphQL.php",
            "line": 97,
            "call": "GraphQL\\GraphQL::promiseToExecute(instance of GraphQL\\Executor\\Promise\\Adapter\\SyncPromiseAdapter, instance of GraphQL\\Type\\Schema, 'mutation {\n  createDocumentEmail(key: \"newmaildocument\", parentId: 141, input: {from: \"from@bla.com\", elements: {wysiwyg: {_editableName: \"greeting_text\", text: \"<p>Hello</p>\"}}}) {\n    success\n  }\n}\n', array(0), array(2), array(0), null, null, null)"
          },
          {
            "file": "/var/www/html/vendor/pimcore/data-hub/src/Controller/WebserviceController.php",
            "line": 197,
            "call": "GraphQL\\GraphQL::executeQuery(instance of GraphQL\\Type\\Schema, 'mutation {\n  createDocumentEmail(key: \"newmaildocument\", parentId: 141, input: {from: \"from@bla.com\", elements: {wysiwyg: {_editableName: \"greeting_text\", text: \"<p>Hello</p>\"}}}) {\n    success\n  }\n}\n', array(0), array(2), array(0), null, null, null)"
          },
          {
            "file": "/var/www/html/vendor/symfony/http-kernel/HttpKernel.php",
            "line": 181,
            "call": "Pimcore\\Bundle\\DataHubBundle\\Controller\\WebserviceController::webonyxAction(instance of Pimcore\\Bundle\\DataHubBundle\\GraphQL\\Service, instance of Pimcore\\Localization\\LocaleService, instance of Pimcore\\Model\\Factory, instance of Symfony\\Component\\HttpFoundation\\Request, instance of Pimcore\\Helper\\LongRunningHelper)"
          },
          {
            "file": "/var/www/html/vendor/symfony/http-kernel/HttpKernel.php",
            "line": 76,
            "call": "Symfony\\Component\\HttpKernel\\HttpKernel::handleRaw(instance of Symfony\\Component\\HttpFoundation\\Request, 1)"
          },
          {
            "file": "/var/www/html/vendor/symfony/http-kernel/Kernel.php",
            "line": 197,
            "call": "Symfony\\Component\\HttpKernel\\HttpKernel::handle(instance of Symfony\\Component\\HttpFoundation\\Request, 1, true)"
          },
          {
            "file": "/var/www/html/vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php",
            "line": 35,
            "call": "Symfony\\Component\\HttpKernel\\Kernel::handle(instance of Symfony\\Component\\HttpFoundation\\Request)"
          },
          {
            "file": "/var/www/html/vendor/autoload_runtime.php",
            "line": 29,
            "call": "Symfony\\Component\\Runtime\\Runner\\Symfony\\HttpKernelRunner::run()"
          },
          {
            "file": "/var/www/html/public/index.php",
            "line": 20,
            "function": "require_once('/var/www/html/vendor/autoload_runtime.php')"
          }
        ]
      }
    }
  ],
  "data": {
    "createDocumentEmail": null
  }
}

Is my query wrong or is this a bug?

Is the element editables missing for email documents?!

Creating the email document without elements works.