code: def test_init_with_fields_config_invalid_field(self):
      fields_config = {ModelSelection.FIELD_NAME_EARLY_STOPPING: bool}
      with self.assertRaisesRegex(
          ValueError, "Name conflict for field"
      ):
          ModelSelection(fields_config=fields_config)
  
imports: import unittest
  from small_text.training.metrics import Metric
  from small_text.training.model_selection import ModelSelectionResult, ModelSelection, NoopModelSelection
label_desc: Use image node_id 7 for calling the ModelSelectionTest obj's underlying member method code with example usage: obj.test_init_with_fields_config_invalid_field() without return types