code: def get_preparer(mixed: Union[SQLCompiler, Engine,
                                Dialect]) -> IdentifierPreparer:
      
      dialect = get_dialect(mixed)
      # noinspection PyUnresolvedReferences
      return dialect.preparer(dialect)
docs: Returns the SQLAlchemy :class:`IdentifierPreparer` in use for the dialect
      being used.
  
      Args:
          mixed: an SQLAlchemy :class:`SQLCompiler`, :class:`Engine`, or
              :class:`Dialect` object
  
      Returns: an :class:`IdentifierPreparer`