[ESS] \delta for julia?

[Boylan, Ross]

From the julia docs http://docs.julialang.org/en/release-0.4/manual/variables/:
In the Julia REPL and several other Julia editing environments, you can type many Unicode math symbols by typing the backslashed LaTeX symbol name followed by tab. For example, the variable name δ can be entered by typing \delta-tab, or even α̂₂ by \alpha-tab-\hat-tab-\_2-tab.

Any  prospect of getting this behavior in ESS?  Or is it already there and I don't know how to use it?
I'm using ESS from git as of a couple days ago (just before the 16.04 pre-release announcement).  I did a make, though I suppose it's possible I'm picking up some older julia-mode.el.

When I run julia from a terminal outside emacs the completion behavior shown above happens; when I run it inside Emacs/ESS it does not.

Ross Boylan