pub unsafe extern "C" fn graphene_box_union(
a: *const graphene_box_t,
b: *const graphene_box_t,
res: *mut graphene_box_t,
)
pub unsafe extern "C" fn graphene_box_union(
a: *const graphene_box_t,
b: *const graphene_box_t,
res: *mut graphene_box_t,
)