Asking about demo code Porting Azure RTOS Thread X to NIOSII

Question

I am a graduate student majoring in Computer Science from Taiwan. Recently, I has been pursuing study of Porting Thread X RTOS to NIOSII on FPGA fabric of Altera SoC FPGA, eventually, I found article as follow. https://learn.microsoft.com/en-us/answers/questions/708417/azure-rtos-support-for-intel-nios-ii-and-cyclone-v Because Azure does not have NIOSII port available on github,  could you tell me how to get Thread X demo code for showing how to port it to NIOSII ? Does it cost money? It seems like it cost money to buy license.  I am looking forward to your reply. Best Regards,