* When that limit is exceeded, the web socket is gracefully shut down.
   */
  fun queueSize(): Long

  /**
   * Attempts to enqueue `text` to be UTF-8 encoded and sent as a the data of a text (type `0x1`)
   * message.
   *
   * This method returns true if the message was enqueued. Messages that would overflow the outgoing
   * message buffer (16 MiB) will be rejected and trigger a [graceful shutdown][close] of this web