code: def testComponentSpecTypeAnnotation(self):
      class MissingAnnotationComponentSpec(types.ComponentSpec):
          PARAMETERS = {}
          INPUTS = {}
          OUTPUTS = {}
  
      class MissingAnnotationComponent(base_component.BaseComponent):
          SPEC_CLASS = MissingAnnotationComponentSpec
          EXECUTOR_SPEC = executor_spec.ExecutorClassSpec(
              base_executor.BaseExecutor
          )
  
      missing_annotation_component = MissingAnnotationComponent(
          spec=MissingAnnotationComponentSpec()
      )
      self.assertIsNone(missing_annotation_component.type_annotation)
  
      class InvalidAnnotationComponentSpec(types.ComponentSpec):
          PARAMETERS = {}
          INPUTS = {}
          OUTPUTS = {}
          TYPE_ANNOTATION = types.ComponentSpec
  
      class InvalidAnnotationComponent(base_component.BaseComponent):
          SPEC_CLASS = InvalidAnnotationComponentSpec
          EXECUTOR_SPEC = executor_spec.ExecutorClassSpec(
              base_executor.BaseExecutor
          )
  
      with self.assertRaisesRegex(
          TypeError, "not a subclass of SystemExecution"
      ):
          _ = InvalidAnnotationComponent(
              spec=InvalidAnnotationComponentSpec()
          ).type_annotation
  
      class MyTrain(SystemExecution):
          MLMD_SYSTEM_BASE_TYPE = "Train"
  
      class MyTrainerComponentSpec(types.ComponentSpec):
          PARAMETERS = {}
          INPUTS = {}
          OUTPUTS = {}
          TYPE_ANNOTATION = MyTrain
  
      class MyTrainerComponent(base_component.BaseComponent):
          SPEC_CLASS = MyTrainerComponentSpec
          EXECUTOR_SPEC = executor_spec.ExecutorClassSpec(
              base_executor.BaseExecutor
          )
  
      self.assertEqual(
          MyTrainerComponent(
              spec=MyTrainerComponentSpec()
          ).type_annotation.MLMD_SYSTEM_BASE_TYPE,
          "Train",
      )
  
imports: import tensorflow
  from tfx import types
  from tfx.dsl.components.base import base_component
  from tfx.dsl.components.base import base_executor
  from tfx.dsl.components.base import executor_spec
  from tfx.proto import example_gen_pb2
  from tfx.types import component_spec
  from tfx.types.system_executions import SystemExecution
  from tfx.utils import json_utils
label_desc: Use image node_id 5 for calling the ComponentTest obj's underlying member method code with example usage: obj.testComponentSpecTypeAnnotation() without return types