Variable display annotation

[OAGr]

It seems like a really common pattern to want to primarily show a variable using a Plot or Table object. For example,

myFn(t) = normal(t,t^2)
fnPlot = Plot.distFn({fn: myFn, xScale:....})

Like with the range annotation, I think these situations might be improved by formally declaring that fnPlot is just meant to visualize myFn. This would mean:

1. In the visualizations, we wouldn't show myFn - we'd just show fnPlot whenever someone wants to see myFn (maybe with a toggle.
2. If myFn gets used in other places, we'd still allow viewing of it with fnPlot.

I'm not sure what the syntax would be for this. At very basic, I could see something like,

declareVariable({var: myFn, view: fnPlot, title: "My Title", comments: "I estimated this due to...."})

Of course, maybe there could later be some natural annotation, like,

@view(Plot.distFn({ fn: {|r| r}, xScale:....})
myFn(t) = normal(t,t^2)

[OAGr]

We have this now with Tags!