@classmethod
def is_capable(cls, in_type, out_type):
    """
        @param::in_type: the type of input dataframe in string
        @param::out_type: the type of output dataframe in string
        return boolean value indicates whether or not the conversion is supported
        """
    raise NotImplementedError(
        '> Dataframe.JointerBase is_capable(): method is not implemented. ')
