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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def pad_token_sequence(self, tokens: Dict[str, List[TokenType]], desired_num_tokens: Dict[str, int], padding_lengths: Dict[str, int]) -> Dict[str, List[TokenType]]: """ This method pads a list of tokens to ``desired_num_tokens`` and returns a padded copy of the input tokens. If the input token list is longer than ``desired_num_tokens`` then it will be truncated. ``padding_lengths`` is used to provide supplemental padding parameters which are needed in some cases. For example, it contains the widths to pad characters to when doing character-level padding. """

        raise NotImplementedError