How to get nested style information from the paragrph style on Indesign server?

Hi All,
   I’m working on C++ plug-in on indesign server 2026. I have to read all paragraph style and find out which has the nested character style in it. But I'm not able find nested style name in paragraph style. 
Has anyone tried this or can anyone suggest me the Interface or boss class to get the nested style information?
   
Thanks in advance. 

Siddhesh