Constructs the rendered state of the menu item from the visuals register.
This will let us see the difference between what the menu item should render vs has rendered.
Returns IRenderedRelations[]
PrivateonGetterUpdate
onGetterUpdate(relations): Promise<void>
Renders batch of entity relationships.
This will check if a relationship SHOULD be rendered before rendering it.
It will also handle already rendered relations to avoid re-rendering them.
Starts rendering the menu item. Re-call with an updated menu item to re-render. It will auto-cleanup old relations.