* This class is not thread safe.
 *
 * [rfc_6455]: http://tools.ietf.org/html/rfc6455
 */
class WebSocketWriter(
  private val isClient: Boolean,
  val sink: BufferedSink,
  val random: Random,
  private val perMessageDeflate: Boolean,
  private val noContextTakeover: Boolean,
  private val minimumDeflateSize: Long,
) : Closeable {
  /** This holds outbound data for compression and masking. */
  private val messageBuffer = Buffer()

 */
@IgnoreJRERequirement // As of AGP 3.4.1, D8 desugars API 24 hashCode methods.
data class WebSocketExtensions(
  /** True if the agreed upon extensions includes the permessage-deflate extension. */
  @JvmField val perMessageDeflate: Boolean = false,
  /** Should be a value in [8..15]. Only 15 is acceptable by OkHttp as Java APIs are limited. */
  @JvmField val clientMaxWindowBits: Int? = null,

 *
 * [rfc_6455]: http://tools.ietf.org/html/rfc6455
 */
class WebSocketReader(
  private val isClient: Boolean,
  val source: BufferedSource,
  private val frameCallback: FrameCallback,
  private val perMessageDeflate: Boolean,
  private val noContextTakeover: Boolean,
) : Closeable {
  private var closed = false
  private var receivedCloseFrame = false

  // Stateful data about the current frame.
  private var opcode = 0