Is there Bamboo Rest API to capture cascading build plan build duration?

[Karthik]

I am trying to capture build duration of parent and child build, when we have dependency between two plans.

Along the same effort, I was also trying to pull dependent build info through API, I did not find an one to find the child plan of a parent. 

Can you please advise me an API which meets my need.

Thanks,

Karthik