Frames White

> what's the recommended way to get at the "contents" of a tangent? There isn't one. I also have been using it in more complex tangents. Possibly we should decide...

For that use case you can use `NamedTuple(tangent)`, I hope.

we probably should note in the docs. > occationally things go wrong, this has been observed in DropBox. Rather than using the default HTTP.jl based `fetch_method`, it can be useful...

Oh yeah, I remember @topolarity on that branch restricted what a bunch of things could contain. In this case i guess `group` was restricted to `Symbol` which seems unfortunate, not...

Should be an easy PR to fix. 1. Add a test that hits it 2. delete the warning

@Keno I think this does *not* have the same concerns that #266 has, but I am not sure. Because for reverse mode everything is already bad. Should we do this,...

right now removing them would break Diffractor for sure, which actually uses the `isnothing` to decide if it is going to recurse. And it would break Zygote that looks at...

I suspect this would be resolved by #276 though really we need to make it so that we don't try to AD things like this, off the active path.

This one: https://raw.githubusercontent.com/BioSystemsUM/MEWpy/6a5031d6b8c654e15b7b53778d7a8186ad735b23/examples/models/kinetic/chassagnole2002.xml This file does load up fine with SBMLImporter.jl, so maybe it is something SBMLImporter supports but SBMLToolkit doesn't?

I had to add `using ModelingToolkit` but incidence matrix looks (from memory) same as what i saw from SBMLImporter.jl Even once i change tspan to (0.800) Plot looks pretty different...