class_docstr: Tests for `tb_proto_library`.
code: def test_service_deps(self):
      self.assertIsInstance(test_base_pb2_grpc.FooServiceServicer, type)
      self.assertIsInstance(
          test_downstream_pb2_grpc.BarServiceServicer, type
      )
  
file_path: tensorboard/tensorboard/defs/tb_proto_library_test.py
imports: from tensorboard import test
  from tensorboard.defs import test_base_pb2
  from tensorboard.defs import test_base_pb2_grpc
  from tensorboard.defs import test_downstream_pb2
  from tensorboard.defs import test_downstream_pb2_grpc
label_desc: Use image node_id 2 for calling the TbProtoLibraryTest obj's underlying member method code with example usage: obj.test_service_deps() without return types