code: def get_pattern_for_span_version(
      self, pattern: str, span: int, version: Optional[int]
  ) -> str:
      return ""
  
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 2 for calling the TestInputProcessor obj's underlying member method code with example usage: obj.get_pattern_for_span_version(pattern, span, version) and returns: str