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I'm unclear on best practices for handling model that has other models as an attribute. For example, if I have a model of a person

ATTRS: {
name: {value: null},
age: {value: null},
city: {value: null},
state: {value: null},
}

and I want to have a array or similar collection as one of the attributes. Something like books with its own ATTRS of title, author, publisher or vacations with ATTRS of location,date,rating. In the case I'm modeling now the sub models are only used in by the main model but I can see other scenarios where they are also used independently (students and teachers, players and teams etc)

Would I create a ModelList and use it in the ATTRS section? Make custom getter/setters that handled an array? Handle it all with methods outside of the ATTRS manually?

Thanks, that was very helpful