0.0.39 is dropping the class_registry variable from main without warnings

[12rambau]

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Example Code

import sqlmodel.main as _sm
from sqlalchemy.orm import registry as _SARegistry
from sqlmodel import SQLModel as _SQLModel

_orig_registry = _SQLModel._sa_registry  # type: ignore[attr-defined]
_orig_class_registry = _sm.class_registry

Description

We were using the class_registry variable to deal with big query compatibility and the drop of this variable makes it impossible to move to 0.0.39. Any reason it was dropped in https://github.com/fastapi/sqlmodel/pull/1806/changes#diff-d47aa94b4399636b3bf61c282806410ca16c47e6edb13a2d3ba675f9460e7389L800 ?
Would it be possible to reintroduce it as this variable was not marked as private ?

Operating System

Linux

Operating System Details

No response

Project Version

0.0.39

Python Version

No response

Additional Context

No response

[YuriiMotov]

When I reviewed that PR I searched for class_registry in the code base, and it appeared to be unused variable.
Could you please explain in more details why your code needs this?