Method addOnce

src/node/services/messageQueue.ts:151–166

* Add a message to the queue once, keyed by dedupeKey. * Returns true if the message was queued.

(
    message: string,
    options?: SendMessageOptions & { fileParts?: FilePart[] },
    dedupeKey?: string,
    internal?: QueuedMessageInternalOptions
  )

   * Returns true if the message was queued.
   */
  addOnce(
    message: string,
    options?: SendMessageOptions & { fileParts?: FilePart[] },
    dedupeKey?: string,
    internal?: QueuedMessageInternalOptions
  ): boolean {
    if (dedupeKey !== undefined && this.dedupeKeys.has(dedupeKey)) {
      return false;
    }

    const didAdd = this.addInternal(message, options, internal);
    if (didAdd && dedupeKey !== undefined) {
      this.dedupeKeys.add(dedupeKey);
    }
    return didAdd;
  }

  private addInternal(
    message: string,