Get channel data from the current generator.  use_cached is
        not supported at the moment, though it must be forced to be
        True in the current_generator in order to avoid generating the
        same data twice (the first time by self() and the second with
        current_generator.channels() ).

def channels(self, use_cached=False, **params_to_override):
        """
        Get channel data from the current generator.  use_cached is
        not supported at the moment, though it must be forced to be
        True in the current_generator in order to avoid generating the
        same data twice (the first time by self() and the second with
        current_generator.channels() ).
        """
        default = self(**params_to_override)
        current_generator = self.get_current_generator()

        res = current_generator.channels(use_cached=True)
        res['default'] = default

        return res