flags = FLAG_NONE,
      )
      sink.writeInt(errorCode.httpCode)
      sink.flush()
    }
  }

  /** The maximum size of bytes that may be sent in a single call to [data]. */
  fun maxDataLength(): Int = maxFrameSize

  /**
   * `source.length` may be longer than the max length of the variant's data frame. Implementations
   * must send multiple frames as necessary.
   *

          throw InterruptedIOException()
        }

        toWrite = minOf(byteCount, writeBytesMaximum - writeBytesTotal).toInt()
        toWrite = minOf(toWrite, writer.maxDataLength())
        writeBytesTotal += toWrite.toLong()
      }

      byteCount -= toWrite.toLong()
      writer.data(outFinished && byteCount == 0L, streamId, buffer, toWrite)
    }
  }

    val newMaxFrameSize = 16777215
    val writer = Http2Writer(Buffer(), true)
    writer.applyAndAckSettings(Settings().set(Settings.MAX_FRAME_SIZE, newMaxFrameSize))
    assertThat(writer.maxDataLength()).isEqualTo(newMaxFrameSize)
    writer.frameHeader(0, newMaxFrameSize, Http2.TYPE_DATA, FLAG_NONE)
  }

  @Test fun streamIdHasReservedBit() {
    val writer = Http2Writer(Buffer(), true)