code: def experimental_as_proto(self):
      serialized_elements = [
          serialization.serialize(element) for element in self.elements
      ]
      proto = serialization_test_pb2.MyCompositeRepresentation(
          elements=serialized_elements
      )
      return proto
  
imports: from tensorflow.core.function.trace_type import serialization
  from tensorflow.core.function.trace_type import serialization_test_pb2
  from tensorflow.python.platform import test
label_desc: Use image node_id 4 for calling the MyCompositeClass obj's underlying member method code with example usage: obj.experimental_as_proto() and returns: proto