pub unsafe extern "C" fn graphene_vec3_init_from_vec3(
v: *mut graphene_vec3_t,
src: *const graphene_vec3_t,
) -> *mut graphene_vec3_t
pub unsafe extern "C" fn graphene_vec3_init_from_vec3(
v: *mut graphene_vec3_t,
src: *const graphene_vec3_t,
) -> *mut graphene_vec3_t