Issue: Access to __interfaces and _get_interface() blocked by RestrictedPython defaults

[xabru]

🐛 Issue: Access to __interfaces and _get_interface() blocked by RestrictedPython defaults

Description
The documentation states that the list of interfaces can be accessed via the __interfaces variable. However, this variable is defined inside a RestrictedPython sandbox, whose default configuration blocks access to names starting with underscores.

As a result:

• __interfaces is not accessible
• _get_interface() is also blocked for the same reason

Question / Issue
How is the user supposed to access the value of __interfaces and the _get_interface() function under the default RestrictedPython configuration?

Is there:

• an alternative public API?
• a required sandbox configuration change?
• or a documentation update needed to clarify this?