text: """Autocorrect, Backend
  
  This module contains an abstract class that represents the common backend structure to
  all autocomplete data structures.
  
  Copyright (c) 2021 Akshat Naik and Tony (Juntao) Hu.
  Licensed under the MIT License. See LICENSE in the project root for license information.
  """
  
  
  class Backend:
      """A class representing an interface common to all data structures used for
      autocorrect/autocomplete features.
      """
  
      def get_suggestions(self, word: str, lim: int = 3) -> list[str]:
          """Get a list of suggestions for autocomplete/autocorrect for the current word.
  
          The length of the list is maximum 'lim'.
          """
          raise NotImplementedError
  
  
  if __name__ == "__main__":
      import doctest
      doctest.testmod()
  
      import python_ta.contracts
      python_ta.contracts.check_all_contracts()
  
      import python_ta
      python_ta.check_all(
          config={
              "extra-imports": [],
              "allowed-io": [],
              "max-line-length": 100,
              "disable": ["E1136"],
          }
      )
  