code: def tolist(expr, **kwargs):
      
      unique = kwargs.get('unique', kwargs.get('_unique', False))
      output_type = None
  
      if isinstance(expr, (SequenceExpr, SequenceGroupBy)):
          output_type = types.List(expr._data_type)
      return _reduction(expr, ToList, output_type, _unique=unique)
docs: Pack all data in the sequence into a list
      :param expr:
      :param unique: make every elements in the sequence to be unique
      :return: