src/vs/workbench/services/extensions/common/lazyPromise.ts/LazyPromise/_ensureActual
class LazyPromise:	private _ensureActual(): Promise<any> {
		if (!this._actual) {
			this._actual = new Promise<any>((c, e) => {
				this._actualOk = c;
				this._actualErr = e;

				if (this._hasValue) {
					this._actualOk(this._value);
				}

				if (this._hasErr) {
					this._actualErr(this._err);
				}
			});
		}
		return this._actual;
	}