Function gtk_sys::gtk_cell_area_foreach_alloc

pub unsafe extern "C" fn gtk_cell_area_foreach_alloc(
    area: *mut GtkCellArea,
    context: *mut GtkCellAreaContext,
    widget: *mut GtkWidget,
    cell_area: *const GdkRectangle,
    background_area: *const GdkRectangle,
    callback: GtkCellAllocCallback,
    callback_data: gpointer
)