The GListModel to use as root
%TRUE to pass through items from the models
%TRUE to set the autoexpand property and expand the @root model
Function to call to create the GListModel for the children of an item
Data to pass to @create_func
Function to call to free @user_data
a newly created GtkTreeListModel.
ConstructionException GTK+ fails to create the object.
Creates a new empty GtkTreeListModel displaying @root with all rows collapsed.