def __call__(self) -> None:
        """Defining __call__ is necessary for the `typing` module to let you use an instance of
        this class as the result of resolving a standard ForwardRef.
        """
Defining __call__ is necessary for the `typing` module to let you use an instance of
        this class as the result of resolving a standard ForwardRef.
        
pydantic/_internal/_forward_ref.py