(cls, *args, **kwargs)
This method should return an instance of this class matching the passed
        arguments, or None if not found.
This method should return an instance of this class matching the passed
        arguments, or None if not found.
This method should return an instance of this class matching the passed arguments or None if not found .
def get_obj(cls, *args, **kwargs):
        """
        This method should return an instance of this class matching the passed
        arguments, or None if not found.
        """
        raise NotImplementedError("Please implement this method.")
def get_obj ( cls , * args , * * kwargs ) : raise NotImplementedError ( "Please implement this method." )