code: def testCall_OutputTypeCompatibility(self):
      @resolver_function.resolver_function
      def resolve():
          return DummyNode(resolver_op.DataType.ARTIFACT_MULTIMAP)
  
      def okay(output_type):
          with self.subTest("Should Pass", output_type=output_type):
              with resolve.given_output_type(output_type):
                  pass
  
      def fail(output_type):
          with self.subTest("Should Fail", output_type=output_type):
              with self.assertRaisesRegex(
                  ValueError, "Invalid output_type"
              ):
                  with resolve.given_output_type(output_type):
                      pass
  
      # Type[Artifact] is okay
      okay(tfx.types.Artifact)
      okay(X)
      fail(X())
  
      # Dict[str, Type[Artifact]] is okay
      okay({})
      okay({"x": X})
      fail({"x": X()})
      fail({0: X})
      fail({"x": "x"})
  
      # Other types fail
      fail(1)
      fail([])
      fail([X, Y])
      fail("not a output type")
  
imports: from typing import Mapping, Set
  import tensorflow
  from tfx.dsl.control_flow import for_each
  from tfx.dsl.control_flow import for_each_internal
  from tfx.dsl.input_resolution import resolver_function
  from tfx.dsl.input_resolution import resolver_op
  import tfx.types
  from tfx.types import resolved_channel
  from tfx.utils import typing_utils
label_desc: Use image node_id 7 for calling the ResolverFunctionTest obj's underlying member method code with example usage: obj.testCall_OutputTypeCompatibility() and returns: DummyNode