code: func (nc *Conn) clearPendingRequestCalls() {
  	if nc.respMap == nil {
  		return
  	}
  	for key, ch := range nc.respMap {
  		if ch != nil {
  			close(ch)
  			delete(nc.respMap, key)
  		}
  	}
  }
docs: // This will clear any pending Request calls.
  // Lock is assumed to be held by the caller.