@staticmethod
def attr_doc_inherit(prnt_attr_doc, child_doc):
    """ Merge the docstrings of method or property from parent class and the corresponding
        attribute of its child.

        Parameters
        ----------
        prnt_attr_doc: Union[None, str]
        child_doc: Union[None, str]

        Raises
        ------
        NotImplementedError

        Notes
        -----
        This works for properties, methods, static methods, class methods, and
        decorated methods/properties."""
    raise NotImplementedError
