src/vs/platform/actions/common/actions.ts/SyncActionDescriptor/constructor
class SyncActionDescriptor:	private constructor(ctor: IConstructorSignature2<string, string | undefined, Action>,
		id: string, label: string | undefined, keybindings?: IKeybindings, keybindingContext?: ContextKeyExpression, keybindingWeight?: number
	) {
		this._id = id;
		this._label = label;
		this._keybindings = keybindings;
		this._keybindingContext = keybindingContext;
		this._keybindingWeight = keybindingWeight;
		this._descriptor = createSyncDescriptor(ctor, this._id, this._label);
	}