class_docstr: Helps read a node or composable pipeline's info from proto representation.
  
  This adapter class uses duck typing to mimic the fields of a PipelineNode
  proto, for both Node and Composable Pipeline.
class_docstr_tok: ["Helps","read","a","node","or","composable","pipeline","'s","info","from","proto","representation",".","This","adapter","class","uses","duck","typing","to","mimic","the","fields","of","a","PipelineNode","proto",",","for","both","Node","and","Composable","Pipeline","."]
code: def downstream_nodes(self) -> Sequence[str]:
      pass
  
imports: import abc
  from typing import Sequence, Union
  from tfx.dsl.compiler import constants
  from tfx.proto.orchestration import pipeline_pb2
  from google.protobuf import message
label_desc: Use image node_id 7 for calling the NodeProtoView obj's underlying member method code with example usage: obj.downstream_nodes() without return types