Method evaluate

code/src/java/plugin/function/GroupFunction.java:120–149

(EvaluateVisitor visitor, Node[] args,
		EvaluationManager manager)

	}

	@Override
	public Object evaluate(EvaluateVisitor visitor, Node[] args,
		EvaluationManager manager)
	{
		String scopeName = (String) args[0].jjtAccept(visitor,
			manager.getWith(EvaluationManager.ASSERTED,
				Optional.of(FormatUtilities.STRING_MANAGER)));
		LoadContext context = manager.get(ManagerKey.CONTEXT);
		PCGenScope scope = context.getVariableContext().getScope(scopeName);
		//Was checked in allowArgs
		@SuppressWarnings("unchecked")
		ReferenceManufacturer<? extends PCGenScoped> refMfg =
				(ReferenceManufacturer<? extends PCGenScoped>) scope
					.getFormatManager(context).get();

		String groupingName = (String) args[1].jjtAccept(visitor,
			manager.getWith(EvaluationManager.ASSERTED,
				Optional.of(FormatUtilities.STRING_MANAGER)));

		Collection<? extends PCGenScoped> all = refMfg.getAllObjects();
		LoadContext subContext = context.dropIntoContext(scopeName);
		//Was checked in allowArgs
		@SuppressWarnings("unchecked")
		GroupingCollection<PCGenScoped> group =
				(GroupingCollection<PCGenScoped>) subContext.getGrouping(scope,
					"GROUP=" + groupingName);
		List<PCGenScoped> available = new ArrayList<>();
		all.forEach(object -> group.process(object, available::add));
		return available.toArray(new PCGenScoped[0]);
	}

	@Override
	public Optional<FormatManager<?>> getDependencies(DependencyVisitor visitor,