bindModel 
  open fun bindModel(model: <Error class: unknown class>? = null, createWidgetFunc: FlowBoxCreateWidgetFunc)(source)
Binds @model to @box.
If @box was already bound to a model, that previous binding is destroyed.
The contents of @box are cleared and then filled with widgets that represent items from @model. @box is updated whenever @model changes. If @model is null, @box is left empty.
It is undefined to add or remove widgets directly (for example, with method@Gtk.FlowBox.insert) while @box is bound to a model.
Note that using a model is incompatible with the filtering and sorting functionality in GtkFlowBox. When using a model, filtering and sorting should be implemented by the model.
Parameters
model
the GListModel to be bound to @box
createWidgetFunc  
a function that creates widgets for items