Restrictions on Model Navigator Display Elements
The Next Design model navigator is important structural information in design tools.
First, let's think about what should be displayed in the model navigator.
As a general rule, it is a good idea to make it a semantic definition unit in the target design in Next Design.
For example, use cases, actors, layers, components, functions, variables, properties, etc. are units to be displayed in the navigator, but
function parameters, return values, etc. should not be elements of the navigator.
You can set the model not to be displayed in the model navigator by unchecking "Show in model navigator" in the inspector.
If you uncheck this box, the model will no longer be displayed under a parent model that owns a field of that class type. It will not be reflected if the type of the field owned by the parent model is not that class, but a class that the class inherits from. In that case, uncheck "Show in Model Navigator" for the inheriting class.