Method __instancecheck__

python/pyarrow/util.py:115–121

(self, other)

    """
    class _DeprecatedMeta(type):
        def __instancecheck__(self, other):
            warnings.warn(
                _DEPR_MSG.format(old_name, next_version, new_class.__name__),
                FutureWarning,
                stacklevel=2
            )
            return isinstance(other, new_class)

    return _DeprecatedMeta(old_name, (new_class,), {})