code: def save_params(self, filename):
          
          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)
docs: [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.