text: from .channels import ChannelMontage, ChannelMontageTuple
  from .channel_types import infer_channel_types, assert_channel_types, VALID_CHANNEL_TYPES
  from .montage_creator import ChannelMontageCreator, auto_infer_referencing
  from .random_channel_selector import (RandomChannelSelector,
                                        filter_non_available_channels)
  