Realm, avoid to store some property : <p>I need to implement a protocol in my User model, which need to have some special properties. But I'd like to avoid them to be stored/persisted in Realm database.</p>

<p>I didn't see in the documentation if there was a keyword for this. Did there is a trick to avoid saving some properties ?</p>

<pre><code>public final class User: Object, Mappable, AvatarImageViewDataSource {

dynamic var id: Int = 0
dynamic var desc: String? = nil
dynamic var email: String? = nil
dynamic var firstName: String? = nil
dynamic var lastName: String? = nil

...

public var myPropertyIDontWantToSave: String? = nil // I don't want this to be stored
</code></pre>
