src/vs/workbench/services/workspaces/common/workspaceTrust.ts/WorkspaceTrustMemento/constructor
class WorkspaceTrustMemento:	constructor(storageService?: IStorageService) {
		if (storageService) {
			this._memento = new Memento('workspaceTrust', storageService);
			this._mementoObject = this._memento.getMemento(StorageScope.WORKSPACE, StorageTarget.MACHINE);
		} else {
			this._mementoObject = {};
		}
	}