if (windowSize != DEFAULT_INITIAL_WINDOW_SIZE) {
        writer.windowUpdate(0, (windowSize - DEFAULT_INITIAL_WINDOW_SIZE).toLong())
      }
    }
    // Thread doesn't use client Dispatcher, since it is scoped potentially across clients via
    // ConnectionPool.
    taskRunner.newQueue().execute(name = connectionName, block = readerRunnable)
  }

    val expectedError = ErrorCode.PROTOCOL_ERROR
    writeMedium(frame, 8) // Without debug data there's only 2 32-bit fields.
    frame.writeByte(TYPE_GOAWAY)
    frame.writeByte(FLAG_NONE)
    frame.writeInt(0) // connection-scope
    frame.writeInt(expectedStreamId) // last good stream.
    frame.writeInt(expectedError.httpCode)

    // Check writer sends the same bytes.
    assertThat(sendGoAway(expectedStreamId, expectedError, EMPTY_BYTE_ARRAY))

import okio.ByteString

internal class DerWriter(sink: BufferedSink) {
  /** A stack of buffers that will be concatenated once we know the length of each. */
  private val stack = mutableListOf(sink)

  /** Type hints scoped to the call stack, manipulated with [pushTypeHint] and [popTypeHint]. */
  private val typeHintStack = mutableListOf<Any?>()

  /**
   * The type hint for the current object. Used to pick adapters based on other fields, such as