c_gtk_cell_area_foreach_alloc

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
void function(GtkCellArea* area, GtkCellAreaContext* context, GtkWidget* widget, GdkRectangle* cellArea, GdkRectangle* backgroundArea, GtkCellAllocCallback callback, void* callbackData) c_gtk_cell_area_foreach_alloc;

Meta