<p dir="auto">Apologies if this has already been asked, couldn't find anything though.  But do you have the capability to utilize multiple objective functions, say a "Split" similar to "Merge"?  The goal would be to implement a model like the one given here:</p>
<p dir="auto"><a href="https://github.com/rbgirshick/fast-rcnn">https://github.com/rbgirshick/fast-rcnn</a></p>
<p dir="auto">That is, have a classifier and a regression objective function that both provide gradient information to backprop.</p>