sc.startGracefulShutdownInternal()
				case http2handlerDoneMsg:
					sc.handlerDone()
				default:
					panic("unknown timer")
				}
			case *http2startPushRequest:
				sc.startPush(v)
			case func(*http2serverConn):
				v(sc)
			default:
				panic(fmt.Sprintf("unexpected type %T", v))
			}
		}

		// If the peer is causing us to generate a lot of control frames,