src/vs/workbench/common/notifications.ts/NotificationViewItemProgress/total
class NotificationViewItemProgress:	total(value: number): void {
		if (this._state.total === value) {
			return;
		}

		this._state.total = value;

		this._state.infinite = undefined;
		this._state.done = undefined;

		this._onDidChange.fire();
	}