Function pulsar_sys::pulsar_client_subscribe

pub unsafe extern "C" fn pulsar_client_subscribe(
    client: *mut pulsar_client_t, 
    topic: *const c_char, 
    subscriptionName: *const c_char, 
    conf: *const pulsar_consumer_configuration_t, 
    consumer: *mut *mut pulsar_consumer_t
) -> pulsar_result