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Some properties are not exposed through GObject introspection facilities, but are rather present as a pair of functions (class_get_property, class_set_property). gobject-class metaclass supports such properties. For these properties to be included in automatically generated class definitions, they should be made known to the generator.
Definitions generator uses variable *additional-properties* to get this information.
Variable *additional-properties* contains a plist that maps GType names to a list of properties definitions (See define-g-object-class for syntax of properties definitions).
To supply the bindings generator with this information, bind *additional-properties* to such list when the generator is run.
Example:
(("GtkTreeViewColumn"
(:cffi gtk::tree-view
gtk::tree-view-column-tree-view
g-object "gtk_tree_view_column_get_tree_view" nil)
(:cffi gtk::sort-column-id
gtk::tree-view-column-sort-column-id
:int "gtk_tree_view_column_get_sort_column_id" "gtk_tree_view_column_set_sort_column_id")
(:cffi gtk::cell-renderers
gtk::tree-view-column-cell-renderers
(glist g-object :free-from-foreign t) "gtk_tree_view_column_get_cell_renderers" nil))
("GtkTreeSelection"
(:cffi gtk::mode
gtk::tree-selection-mode
gtk::selection-mode "gtk_tree_selection_get_mode" "gtk_tree_selection_set_mode")
(:cffi gtk::select-function
gtk::tree-selection-select-function
nil gtk::tree-selection-get-selection-function gtk::tree-selection-set-select-function)))