Function validate_collation_or_none

pymongo/collation.py:217–226

(
    value: Optional[Union[Mapping[str, Any], Collation]]
)

def validate_collation_or_none(
    value: Optional[Union[Mapping[str, Any], Collation]]
) -> Optional[dict[str, Any]]:
    if value is None:
        return None
    if isinstance(value, Collation):
        return value.document
    if isinstance(value, dict):
        return value
    raise TypeError("collation must be a dict, an instance of collation.Collation, or None")