override fun close(
    code: Int,
    reason: String?,
  ): Boolean {
    return close(code, reason, webSocketCloseTimeout)
  }

  @Synchronized fun close(
    code: Int,
    reason: String?,
    cancelAfterCloseMillis: Long,
  ): Boolean {
    validateCloseCode(code)

    var reasonBytes: ByteString? = null
    if (reason != null) {
      reasonBytes = reason.encodeUtf8()