pub unsafe extern "C" fn graphene_quaternion_init_from_quaternion(
q: *mut graphene_quaternion_t,
src: *const graphene_quaternion_t,
) -> *mut graphene_quaternion_t
pub unsafe extern "C" fn graphene_quaternion_init_from_quaternion(
q: *mut graphene_quaternion_t,
src: *const graphene_quaternion_t,
) -> *mut graphene_quaternion_t