Function paho_mqtt_sys::MQTTAsync_unsubscribeMany

pub unsafe extern "C" fn MQTTAsync_unsubscribeMany(
    handle: MQTTAsync, 
    count: c_int, 
    topic: *const *mut c_char, 
    response: *mut MQTTAsync_responseOptions
) -> c_int

This function attempts to remove existing subscriptions to a list of topics made by the specified client. @param handle A valid client handle from a successful call to MQTTAsync_create(). @param count The number subscriptions to be removed. @param topic An array (of length count) of pointers to the topics of the subscriptions to be removed, each of which may include wildcards. @param response A pointer to a response options structure. Used to set callback functions. @return ::MQTTASYNC_SUCCESS if the subscriptions are removed. An error code is returned if there was a problem removing the subscriptions.