Method _maybe_squeeze_arg

pandas/core/internals/blocks.py:943–947

For compatibility with 1D-only ExtensionArrays.

(self, arg: np.ndarray)

    #  but not ExtensionBlock

    def _maybe_squeeze_arg(self, arg: np.ndarray) -> np.ndarray:
        """
        For compatibility with 1D-only ExtensionArrays.
        """
        return arg

    def _unwrap_setitem_indexer(self, indexer):
        """