pub unsafe extern "C" fn graphene_quaternion_init_from_euler(
q: *mut graphene_quaternion_t,
e: *const graphene_euler_t
) -> *mut graphene_quaternion_t
pub unsafe extern "C" fn graphene_quaternion_init_from_euler(
q: *mut graphene_quaternion_t,
e: *const graphene_euler_t
) -> *mut graphene_quaternion_t