wexpect.spawn(echo=False) is not work and setecho(False) is raise the "AttributeError: 'SpawnPipe' object has no attribute 'setecho'" exception.

[nhtha]

Dear experts,
I'm starting to use wexpect to interact with putty's plink.exe. but I'm facing the following issue with echo:

Describe the bug
wexpect.spawn(echo=False) is not work and setecho(False) is raise the "AttributeError: 'SpawnPipe' object has no attribute 'setecho'" exception.

To Reproduce
Steps to reproduce the behavior:
ssh = wexpect.spawn(command='plink.exe', timeout=60, maxread=99999, echo=False)
ssh.setecho(False)

Expected behavior
Texts were sent by sendline() are not include in the ssh.before.

Screenshots

Environment:

• [windows version] Windows 11 Pro for Workstation 23H2
• [Python version] 3.10.8
• [wexpect version] 4.0
• [putty plink version] Release 0.80

Please help me to identify and solve this issue.
Best regards,
Ha Nguyen