@Throws(IOException::class)
  fun applyAndAckSettings(peerSettings: Settings) {
    withLock {
      if (closed) throw IOException("closed")
      this.maxFrameSize = peerSettings.getMaxFrameSize(maxFrameSize)
      if (peerSettings.headerTableSize != -1) {
        hpackWriter.resizeHeaderTable(peerSettings.headerTableSize)
      }
      frameHeader(
        streamId = 0,
        length = 0,

import okio.BufferedSource
import okio.ByteString
import okio.Source
import okio.Timeout

/**
 * Reads HTTP/2 transport frames.
 *
 * This implementation assumes we do not send an increased [frame][Settings.getMaxFrameSize] to the
 * peer. Hence, we expect all frames to have a max length of [Http2.INITIAL_MAX_FRAME_SIZE].
 */
class Http2Reader(
  /** Creates a frame reader with max header table size of 4096. */