Consider adding support for maps of non-nullable objects

[nirinchev]

When designing maps, we decided we wanted to preserve the keys, even after deleting the corresponding value object because keys may have meaning to users and deleting them would represent data loss. However, users of the Swift SDK (realm/realm-swift#8379) have pointed out that they'd prefer behavior similar to lists/sets where deleting an object also removes it from the collection.

We could achieve similar functionality in a non-breaking way by allowing users to define maps of non-nullable objects (this is currently disallowed), where Core will automatically remove the key-value pair from the dictionary.

[sync-by-unito]

➤ PM Bot commented:

Jira ticket: RCORE-2074