Method close

cli/src/utils/MessageQueue2.ts:287–297

* Close the queue - no more messages can be pushed

()

     * Close the queue - no more messages can be pushed
     */
    close(): void {
        logger.debug(`[MessageQueue2] close() called`);
        this.closed = true;

        // Notify any waiting caller
        if (this.waiter) {
            const waiter = this.waiter;
            this.waiter = null;
            waiter(false);
        }
    }

    /**
     * Check if the queue is closed