Function push

lib/util/processAsyncTree.js:33–39

(item)

	 * @param {T} item item
	 */
	const push = (item) => {
		queue.push(item);
		if (!processScheduled && processing < concurrency) {
			processScheduled = true;
			process.nextTick(processQueue);
		}
	};

	/**
	 * Handles completion of a single processor call, propagating the first