UINT _nxd_mqtt_client_message_get(NXD_MQTT_CLIENT *client_ptr,
UCHAR *topic_buffer,
UINT topic_buffer_size,
UINT *actual_topic_length,
UCHAR *message_buffer,
UINT message_buffer_size,
UINT *actual_message_length);
Implemented in nxd_mqtt_client.c:5239