code: def as_channel(
      source: Union[Channel, Iterable[types.Artifact]]
  ) -> Channel:
      return channel_utils.as_channel(source)
  
imports: from typing import Dict, Iterable, List, Union
  from tfx import types
  from tfx.types import channel_utils
  from tfx.utils import deprecation_utils
label_desc: Use image node_id 1 for calling a global function with example usage: as_channel(source) and returns: channel_utils