@classmethod
def _get_test_callable(cls, test):
    """
        Get the test callable, from the test.

        :param test:
            The test that has raised an error or succeeded
        :type test:
            :class:`nose.case.Test` or :class:`pytest.Item`
        :return:
            The test declaration, callable and name that is being run
        :rtype:
            `callable`
        """
    raise NotImplementedError
