Method addItemFirst

jsonrpc/src/linkedMap.ts:199–210

(item: Item<K, V>)

	*/

	private addItemFirst(item: Item<K, V>): void {
		// First time Insert
		if (!this._head && !this._tail) {
			this._tail = item;
		} else if (!this._head) {
			throw new Error('Invalid list');
		} else {
			item.next = this._head;
			this._head.previous = item;
		}
		this._head = item;
	}

	private addItemLast(item: Item<K, V>): void {
		// First time Insert