Custom collections do not show any available methods in IDE

[PProfizi]

Before submitting the issue

• I have checked for Compatibility issues
• I have searched among the existing issues
• I am using a Python virtual environment

Description of the bug

A GenericDataContainersCollection does not show any available methods in IDEs when trying autocompletion.
Probably due to the design for custom collections.
This is a major issue with this design.

Steps To Reproduce

try to get available methods with:

bc = dpf.GenericDataContainersCollection()
bc.  # -> should propose methods from Collection

Which Operating System causes the issue?

Windows

Which DPF/Ansys version are you using?

DPF Server 2025.2.pre0

Which Python version causes the issue?

3.12

Installed packages

NA