How (editor + requestfactory) can actually update a collection in a domain

Hi,

I have a entity e.g.

public class User{
byte[] id;
String name;
List<ContactDetail> contact;
}

public class ContactDetail {
byte[] id,
String name,
int privacyFlag,
.....
}

The question is how can we wire the contactDetails to an editor and
send only the changes to the server, not the whole 500 contactDetails
the user domain have.
Is there an example of this? or is there any best practice/
recommendation on this?

Kind Regards
Andy

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