def to_volume(volume):
        """Serializes volume to id string
        :param volume: object to serialize
        :return: string id
        """
        from sevenbridges.models.volume import Volume
        if not volume:
            raise SbgError('Volume is required!')
        elif isinstance(volume, Volume):
            return volume.id
        elif isinstance(volume, six.string_types):
            return volume
        else:
            raise SbgError('Invalid volume parameter!')
def to_volume ( volume ) : from sevenbridges . models . volume import Volume if not volume : raise SbgError ( 'Volume is required!' ) elif isinstance ( volume , Volume ) : return volume . id elif isinstance ( volume , six . string_types ) : return volume else : raise SbgError ( 'Invalid volume parameter!' )
Serializes volume to id string
        :param volume: object to serialize
        :return: string id