class Xcodeproj::Project::Object::Association::HasMany

def direct_get
  uuids = @owner.send(@reflection.attribute_getter)
  if @block
    # Evaluate the block, which was specified at the class level, in
    # the instance’s context.
    @owner.list_by_class(uuids, @reflection.klass) do |list|
      list.let(:push) do |new_object|
        @owner.instance_exec(new_object, &@block)
      end
    end
  else
    @owner.list_by_class(uuids, @reflection.klass)
  end
end

def direct_set(list)
  @owner.send(@reflection.attribute_setter, list.map(&:uuid))
end

def inverse_get
  PBXObjectList.new(@reflection.klass, @owner.project) do |list|
    list.let(:uuid_scope) do
      @owner.project.objects.list_by_class(@reflection.klass).select do |object|
        object.send(@reflection.inverse.attribute_getter) == @owner.uuid
      end.map(&:uuid)
    end
    list.let(:push) do |new_object|
      new_object.send(@reflection.inverse.attribute_setter, @owner.uuid)
    end
  end
end

def inverse_set(list)
  raise NotImplementedError
end