src/vs/workbench/contrib/tasks/common/tasks.ts/from
	export function from(value: string | TaskGroup | undefined): TaskGroup | undefined {
		if (value === undefined) {
			return undefined;
		} else if (Types.isString(value)) {
			if (is(value)) {
				return { _id: value, isDefault: false };
			}
			return undefined;
		} else {
			return value;
		}
	}