alias

The contact's alias if available, falling back to their identifier if no alias is available or if the Contact has not been set up to track ALIAS.

This alias may have been supplied by the contact themselves, or by the local user, so it does not necessarily unambiguously identify the contact. However, it is suitable for use as a main "display name" for the contact.

This is never null for contact objects that are visible to library-user code.