code: def test_error_classes_duplicated(self):
      # Test error classes is not duplicated
      def detect_duplication(pairs):
          error_classes_json = {}
          for name, message in pairs:
              self.assertTrue(
                  name not in error_classes_json,
                  f"Duplicate error class: {name}",
              )
              error_classes_json[name] = message
          return error_classes_json
  
      json.loads(
          ERROR_CLASSES_JSON, object_pairs_hook=detect_duplication
      )
  
file_path: spark/python/pyspark/errors/tests/test_errors.py
imports: import json
  import unittest
  from pyspark.errors import PySparkValueError
  from pyspark.errors.error_classes import ERROR_CLASSES_JSON
  from pyspark.errors.utils import ErrorClassesReader
label_desc: Use image node_id 2 for calling the ErrorsTest obj's underlying member method code with example usage: obj.test_error_classes_duplicated() and returns: error_classes_json