text: # Copyright 2019 Google LLC. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  """Subpackage for TFX pipeline types."""
  
  from tfx.types.artifact import Artifact
  from tfx.types.channel import BaseChannel
  from tfx.types.channel import Channel
  from tfx.types.channel import ExecPropertyTypes
  from tfx.types.channel import LoopVarChannel
  from tfx.types.channel import OutputChannel
  from tfx.types.channel import Property  # Type alias.
  from tfx.types.component_spec import ComponentSpec
  from tfx.types.value_artifact import ValueArtifact
  