private fun readMessageFrame() {
    val opcode = this.opcode
    if (opcode != OPCODE_TEXT && opcode != OPCODE_BINARY) {
      throw ProtocolException("Unknown opcode: ${opcode.toHexString()}")
    }

    readMessage()

    if (readingCompressedMessage) {
      val messageInflater =
        this.messageInflater
          ?: MessageInflater(noContextTakeover).also { this.messageInflater = it }