<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def state_cpfs(self) -> List[CPF]:
        '''Returns list of state-fluent CPFs.'''
        _, cpfs = self.cpfs
        state_cpfs = []
        for cpf in cpfs:
            name = utils.rename_next_state_fluent(cpf.name)
            if name in self.state_fluents:
                state_cpfs.append(cpf)
        state_cpfs = sorted(state_cpfs, key=lambda cpf: cpf.name)
        return state_cpfs