docstr: Test that we can create a proto class.
code: def testMakeSimpleProtoClass(self):
      """Test that we can create a proto class."""
      proto_cls = proto_builder.MakeSimpleProtoClass(
          self._fields,
          full_name="net.proto2.python.public.proto_builder_test.Test",
      )
      proto = proto_cls()
      proto.foo = 12345
      proto.bar = "asdf"
      self.assertMultiLineEqual(
          'bar: "asdf"\nfoo: 12345\n',
          text_format.MessageToString(proto),
      )
  
file_path: coremltools/deps/protobuf/python/google/protobuf/internal/proto_builder_test.py
imports: from google.protobuf import descriptor_pb2
  from google.protobuf import descriptor_pool
  from google.protobuf import proto_builder
  from google.protobuf import text_format
label_desc: Use image node_id 2 for calling the ProtoBuilderTest obj's underlying member method code with example usage: obj.testMakeSimpleProtoClass() without return types