Channels() adds a shared interface for single channel and
        multichannel structures.  It will always return an ordered
        dict: its first element is the single channel of the pattern
        (if single-channel) or the channel average (if multichannel);
        the successive elements are the individual channels' arrays
        (key: 0,1,..N-1).

def channels(self, use_cached=False, **params_to_override):
        """
        Channels() adds a shared interface for single channel and
        multichannel structures.  It will always return an ordered
        dict: its first element is the single channel of the pattern
        (if single-channel) or the channel average (if multichannel);
        the successive elements are the individual channels' arrays
        (key: 0,1,..N-1).
        """
        return collections.OrderedDict({ 'default':self.__call__(**params_to_override) })