pub unsafe extern "C" fn gtk_cell_area_render(
    area: *mut GtkCellArea,
    context: *mut GtkCellAreaContext,
    widget: *mut GtkWidget,
    cr: *mut cairo_t,
    background_area: *const GdkRectangle,
    cell_area: *const GdkRectangle,
    flags: GtkCellRendererState,
    paint_focus: gboolean
)