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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 from_json(cls, data: str, force_snake_case=True, force_cast: bool=False, restrict: bool=False) -> T: """From json string to instance :param data: Json string :param force_snake_case: Keys are transformed to snake case in order to compliant PEP8 if True :param force_cast: Cast forcibly if True :param restrict: Prohibit extra parameters if True :return: Instance Usage: 1 'Tom' 'Apfel' """

        return cls.from_dict(util.load_json(data),
                             force_snake_case=force_snake_case,
                             force_cast=force_cast,
                             restrict=restrict)