Function gtk_sys::gtk_paint_flat_box

pub unsafe extern "C" fn gtk_paint_flat_box(
    style: *mut GtkStyle,
    cr: *mut cairo_t,
    state_type: GtkStateType,
    shadow_type: GtkShadowType,
    widget: *mut GtkWidget,
    detail: *const c_char,
    x: c_int,
    y: c_int,
    width: c_int,
    height: c_int
)