code: def get_filters_params(self, params=None):
          
          if not params:
              params = self.params
          lookup_params = params.copy()  # a dictionary of the query string
          # Remove all the parameters that are globally and systematically
          # ignored.
          for ignored in IGNORED_PARAMS:
              if ignored in lookup_params:
                  del lookup_params[ignored]
          return lookup_params
docs: Returns all params except IGNORED_PARAMS