class virtual [['row, 'a, 'b, 'c]] custom_tree_model : column_list -> [[Gtk.tree_model_custom, 'row, 'a, 'b, 'c]] custom_tree_model_type
[['row, 'a, 'b, 'c]]
column_list ->
[[Gtk.tree_model_custom, 'row, 'a, 'b, 'c]]
custom_tree_model_type
A base class to inherit from to make a custom tree model.