code: def inputs(self):
      return self._input_dict
  
imports: import unittest
  import tensorflow
  from tfx import types
  from tfx.dsl.components.base import base_node
  from tfx.dsl.context_managers import dsl_context_registry
  from tfx.dsl.control_flow import for_each
  from tfx.orchestration import pipeline
  from tfx.types import resolved_channel
  from tfx.utils import test_case_utils
label_desc: Use image node_id 2 for calling the FakeNode obj's underlying member method code with example usage: obj.inputs() and returns: self