src/vs/workbench/contrib/tasks/browser/abstractTaskService.ts/AbstractTaskService/splitPerGroupType
class AbstractTaskService:	private splitPerGroupType(tasks: Task[]): { none: Task[]; defaults: Task[] } {
		let none: Task[] = [];
		let defaults: Task[] = [];
		for (let task of tasks) {
			if ((task.configurationProperties.group as TaskGroup).isDefault) {
				defaults.push(task);
			} else {
				none.push(task);
			}
		}
		return { none, defaults };
	}