def save_params(self, filename):
        """[Deprecated] Please use save_parameters. Note that if you want load
        from SymbolBlock later, please use export instead.

        Save parameters to file.

        filename : str
            Path to file.
        """
        warnings.warn("save_params is deprecated. Please use save_parameters. "
                      "Note that if you want load from SymbolBlock later, please "
                      "use export instead. For details, see "
                      "https://mxnet.incubator.apache.org/tutorials/gluon/save_lo"
                      "ad_params.html")
        try:
            self.collect_params().save(filename, strip_prefix=self.prefix)
        except ValueError as e:
            raise ValueError('%s\nsave_params is deprecated. Using ' \
                              'save_parameters may resolve this error.'%e.message)
[Deprecated] Please use save_parameters. Note that if you want load
        from SymbolBlock later, please use export instead.

        Save parameters to file.

        filename : str
            Path to file.