Function ic_cdk::api::call::call_raw

pub fn call_raw<'a, T: AsRef<[u8]> + Send + Sync + 'a>(
    id: Principal,
    method: &str,
    args_raw: T,
    payment: u64
) -> impl Future<Output = CallResult<Vec<u8>>> + Send + Sync + 'a

Similar to call, but without serialization.