docs: def set_stopextend(self, n):
          """Extend the True elements by n when setting the conditions
          based on a 'stopcond' condition.
  
          n is an integer >= 0.
  
          .. note::
             Updates the mask if not no_auto.
          """
          self.conconf.set_condition('stopextend', n)
          if not self.no_auto:
              self.make_mask()