code: def default_classification_value_maps(classification):
      
      value_maps = {}
      for hazard_class in classification['classes']:
          value_maps[hazard_class['key']] = hazard_class.get(
              'string_defaults', [])
  
      return value_maps
docs: Helper to get default value maps from classification.
  
      :param classification: Classification definition.
      :type classification: dict
  
      :returns: Dictionary with key = the class key and value = default strings.
      :rtype: dict