Parses a string containing a <link linkend="BUILDER-UI">GtkBuilder UI definition</link> building only the requested objects and merges them with the current contents of @builder. Upon errors 0 will be returned and @error will be assigned a GError from the GTK_BUILDER_ERROR or G_MARKUP_ERROR domain. <note><para> If you are adding an object that depends on an object that is not its child (for instance a GtkTreeView that depends on its GtkTreeModel), you have to explicitely list all of them in @object_ids. </para></note>