code: def timeout(self, err=None):
      spawn = self.spawn
  
      spawn.before = spawn._before.getvalue()
      spawn.after = TIMEOUT
      index = self.searcher.timeout_index
      if index >= 0:
          spawn.match = TIMEOUT
          spawn.match_index = index
          return index
      else:
          spawn.match = None
          spawn.match_index = None
          msg = str(spawn)
          msg += "\nsearcher: %s" % self.searcher
          if err is not None:
              msg = str(err) + "\n" + msg
  
          exc = TIMEOUT(msg)
          exc.__cause__ = (
              None  # in Python 3.x we can use "raise exc from None"
          )
          raise exc
  
imports: import time
  from .exceptions import EOF, TIMEOUT
label_desc: Use image node_id 6 for calling the Expecter obj's underlying member method code with example usage: obj.timeout(err) and returns: index