function to be called when a build is added to queue

[MaxiTrompe]

Hello,
 
I am trying to implement a function that would be triggered when a build is 
added to the queue.
I found the RunListener class that allows me to see when a build is 
started(not in queue, but starting to build), when a build is complete, but 
nothing on when it is added to the queue.
I looked on the documentation for such a thing, but i could not find.
 
If anyone knows how to do so, it would be great,
 
Thank you