src/vs/workbench/api/common/extHostTypes.ts/TaskGroup/from
class TaskGroup:	public static from(value: string) {
		switch (value) {
			case 'clean':
				return TaskGroup.Clean;
			case 'build':
				return TaskGroup.Build;
			case 'rebuild':
				return TaskGroup.Rebuild;
			case 'test':
				return TaskGroup.Test;
			default:
				return undefined;
		}
	}