generated Func methods for SqlProc not available in python

[daimor]

Describe the bug
When class contains Query, IRIS automatically generates Func method for the query, for fast execute
But it's not available from python

iris version/image
IRIS for UNIX (Ubuntu Server LTS for ARM64 Containers) 2023.2 (Build 227U) Mon Jul 31 2023 17:43:25 EDT

python version
Is it a python3 or irispython

To Reproduce

>>> iris.cls('%File').FileSetFunc()
Traceback (most recent call last):
  File "<input>", line 1, in <module>
AttributeError: Property FileSetFunc not found in object of type iris.%Library.File
>>> 

Expected behavior
Should work the same as from ObjectScript