Method type for #EDataBookCursorClass.compare_contact()
Cursor implementations must implement this in order to compare a
contact with the current cursor state.
This is called when the addressbook backends notify active cursors
that the addressbook has been modified with e_data_book_cursor_contact_added() and
e_data_book_cursor_contact_removed().
Method type for #EDataBookCursorClass.compare_contact()
Cursor implementations must implement this in order to compare a contact with the current cursor state.
This is called when the addressbook backends notify active cursors that the addressbook has been modified with e_data_book_cursor_contact_added() and e_data_book_cursor_contact_removed().