frameHeader(
        streamId = 0,
        length = 8 + debugData.size,
        type = TYPE_GOAWAY,
        flags = FLAG_NONE,
      )
      sink.writeInt(lastGoodStreamId)
      sink.writeInt(errorCode.httpCode)
      if (debugData.isNotEmpty()) {
        sink.write(debugData)
      }
      sink.flush()
    }
  }

  /**

        override fun goAway(
          lastGoodStreamId: Int,
          errorCode: ErrorCode,
          debugData: ByteString,
        ) {
          assertThat(lastGoodStreamId).isEqualTo(expectedStreamId)
          assertThat(errorCode).isEqualTo(expectedError)
          assertThat(debugData.size).isEqualTo(0)
        }
      },
    )
  }

  @Test fun goAwayWithDebugDataRoundTrip() {

        "TYPE_GOAWAY unexpected error code: $errorCodeInt",
      )
    var debugData = ByteString.EMPTY
    if (opaqueDataLength > 0) { // Must read debug data in order to not corrupt the connection.
      debugData = source.readByteString(opaqueDataLength.toLong())
    }
    handler.goAway(lastStreamId, errorCode, debugData)
  }

  /** Unlike other `readXxx()` functions, this one must log the frame before returning. */

  }

  override fun ping(
    ack: Boolean,
    payload1: Int,
    payload2: Int,
  ) {
    fail("")
  }

  override fun goAway(
    lastGoodStreamId: Int,
    errorCode: ErrorCode,
    debugData: ByteString,
  ) {
    fail("")
  }

  override fun windowUpdate(
    streamId: Int,
    windowSizeIncrement: Long,
  ) {
    fail("")
  }

  override fun priority(
    streamId: Int,

    }

    override fun goAway(
      lastGoodStreamId: Int,
      errorCode: ErrorCode,
      debugData: ByteString,
    ) {
      check(type == -1)
      this.type = Http2.TYPE_GOAWAY
      this.streamId = lastGoodStreamId
      this.errorCode = errorCode
      this.data = debugData.toByteArray()
    }

    override fun windowUpdate(
      streamId: Int,
      windowSizeIncrement: Long,

        }
      }
    }

    override fun goAway(
      lastGoodStreamId: Int,
      errorCode: ErrorCode,
      debugData: ByteString,
    ) {
      if (debugData.size > 0) {
        // TODO: log the debugData
      }

      // Copy the streams first. We don't want to hold a lock when we call receiveRstStream().
      val streamsCopy: Array<Http2Stream>

	LastStreamID uint32
	ErrCode      http2ErrCode
	debugData    []byte
}

// DebugData returns any debug data in the GOAWAY frame. Its contents
// are not defined.
// The caller must not retain the returned memory past the next
// call to ReadFrame.
func (f *http2GoAwayFrame) DebugData() []byte {
	f.checkValid()
	return f.debugData
}