code: def get_latest_span(self) -> int:
      return 0
  
file_path: tfx/tfx/components/example_gen/input_processor_test.py
imports: from typing import Optional
  import tensorflow
  from tfx.components.example_gen import input_processor
  from tfx.proto import example_gen_pb2
  from tfx.proto import range_config_pb2
label_desc: Use image node_id 1 for calling the TestInputProcessor obj's underlying member method code with example usage: obj.get_latest_span() and returns: int