<para>The <seecref="M:GLib.Settings.WritableChangeEvent"/> event utilizes this delegate:</para>
<para>Event data is passed via the <seecref="T:GLib.WritableChangeEventArgs"/> parameter.</para>
<para>To attach a <seecref="T:GLib.WritableChangeEventHandler"/> to an event, add the WritableChangeEventHandler instance to the event. The methods referenced by the WritableChangeEventHandler instance are invoked whenever the event is raised, until the WritableChangeEventHandler is removed from the event.</para>