@abc.abstractmethod<EOL><INDENT>def updateParams(self, newvalues, update_all=False):<DEDENT>
pass<EOL>
Update model params.

        This method is the **only** acceptable way to update
        model parameters; other dependent model parameters are
        automatically updated as needed if you use this method.

        Args:
            `newvalues` (dict)
                Can be keyed by any parameter in `freeparams`.
            `update_all` (bool)
                If `True`, update all dependent attributes using
                current values of model parameters.