Table view drill down - caller vs callee

Looking at the table view for a typical Julia session:

It looks to me that if I expand say the second row, then I get a list of stack frames that are calling the function on the second line, and then if I expand further I get the callers of those lines etc.

I think that is very useful, but wouldn't it be even more useful if expand showed the functions that are being called from that function, i.e. a way to drill down and see how the time is composed across the work that is being done inside the function that I'm drilling down into?

Maybe in an ideal way one could explore in both directions from any given row?

CC @pfitzseb, @aviatesk, @vchuravy

Start with the table view for .cpuprofile files and trace how expanding a row currently shows caller stack frames. Define how a row should expose callee relationships, including whether users can explore both directions. Done means the drill-down behavior supports inspecting how time is composed inside a function as well as its callers.