I got error: implicit declaration of function 'LoRaMacTestSetDutyCycleOn' when compiling. I tried both GCC and Eclipse, the same error. <img width="887" alt="screen shot 2018-02-02 at 17 46 33" src="https://user-images.githubusercontent.com/6489921/35726791-0ac193cc-0841-11e8-9dd2-1a7d9dd92d5f.png">