src/vs/workbench/services/extensions/common/lazyPromise.ts/LazyPromise/constructor
class LazyPromise:	constructor() {
		this._actual = null;
		this._actualOk = null;
		this._actualErr = null;
		this._hasValue = false;
		this._value = null;
		this._hasErr = false;
		this._err = null;
	}