code: def test_load_schema_missing_no_default(self) -> None:
      with self.assertRaises(TypeError):
          self.mapper.map_with_type({}, SampleConfigTypes)
  
imports: from enum import Enum
  from typing import ClassVar, Dict, List, Optional, Union
  from unittest import main, TestCase
  import attr
  from torchbiggraph.schema import Dumper, extract_nested_type, inject_nested_value, Loader, Schema, schema, unpack_optional
label_desc: Use image node_id 6 for calling the TestLoader obj's underlying member method code with example usage: obj.test_load_schema_missing_no_default() without return types