old_contents: """Shared functions for the config module."""
  
  import yaml
  
  
  def to_dict(value):
      """Recursively transform a class from `config.models` to a dict."""
      if hasattr(value, 'as_dict'):
          return value.as_dict()
      if isinstance(value, list):
          return [
              to_dict(v)
              for v in value
          ]
      if isinstance(value, dict):
          return {
              k: to_dict(v)
              for k, v in value.items()
          }
      return value
  
  
  def list_to_dict(list_):
      """Transform a list to a dictionary with its indices as keys."""
      dict_ = {
          str(i): element
          for i, element in enumerate(list_)
      }
      return dict_
  
new_contents: """Shared functions for the config module."""
  
  
  def to_dict(value):
      """Recursively transform a class from `config.models` to a dict."""
      if hasattr(value, 'as_dict'):
          return value.as_dict()
      if isinstance(value, list):
          return [
              to_dict(v)
              for v in value
          ]
      if isinstance(value, dict):
          return {
              k: to_dict(v)
              for k, v in value.items()
          }
      return value
  
  
  def list_to_dict(list_):
      """Transform a list to a dictionary with its indices as keys."""
      dict_ = {
          str(i): element
          for i, element in enumerate(list_)
      }
      return dict_
  
subject: Remove unused import