code: def setUp(self):
      self.my_file = descriptor.FileDescriptor(
          name="some/filename/some.proto", package="protobuf_unittest"
      )
      self.my_enum = descriptor.EnumDescriptor(
          name="ForeignEnum",
          full_name="protobuf_unittest.ForeignEnum",
          filename=None,
          file=self.my_file,
          values=[
              descriptor.EnumValueDescriptor(
                  name="FOREIGN_FOO", index=0, number=4
              ),
              descriptor.EnumValueDescriptor(
                  name="FOREIGN_BAR", index=1, number=5
              ),
              descriptor.EnumValueDescriptor(
                  name="FOREIGN_BAZ", index=2, number=6
              ),
          ],
      )
      self.my_message = descriptor.Descriptor(
          name="NestedMessage",
          full_name="protobuf_unittest.TestAllTypes.NestedMessage",
          filename=None,
          file=self.my_file,
          containing_type=None,
          fields=[
              descriptor.FieldDescriptor(
                  name="bb",
                  full_name="protobuf_unittest.TestAllTypes.NestedMessage.bb",
                  index=0,
                  number=1,
                  type=5,
                  cpp_type=1,
                  label=1,
                  has_default_value=False,
                  default_value=0,
                  message_type=None,
                  enum_type=None,
                  containing_type=None,
                  is_extension=False,
                  extension_scope=None,
              ),
          ],
          nested_types=[],
          enum_types=[
              self.my_enum,
          ],
          extensions=[],
      )
      self.my_method = descriptor.MethodDescriptor(
          name="Bar",
          full_name="protobuf_unittest.TestService.Bar",
          index=0,
          containing_service=None,
          input_type=None,
          output_type=None,
      )
      self.my_service = descriptor.ServiceDescriptor(
          name="TestServiceWithOptions",
          full_name="protobuf_unittest.TestServiceWithOptions",
          file=self.my_file,
          index=0,
          methods=[self.my_method],
      )
  
imports: import unittest
  from google.protobuf import unittest_custom_options_pb2
  from google.protobuf import unittest_import_pb2
  from google.protobuf import unittest_pb2
  from google.protobuf import descriptor_pb2
  from google.protobuf import descriptor
  from google.protobuf import text_format
label_desc: Use image node_id 1 for calling the DescriptorTest obj's underlying member method code with example usage: obj.setUp() without return types