[ESS] Helper function for assignInNamespace?

[Seth Falcon]

In R, when working on a package with a NAMESPACE, assignInNamespace()
allows one to fix functions without having to reload the package.

It would be nice to have an ESS function that was similar to
ess-eval-function, that:

  - automagically guessed the 'current' package
  - used assignInNamespace to set the definition in the 'current'
    package.


1. Is there such a feature that I've missed?  
2. Does anyone have code to do this already?
3. Suggestions for implementation?


--
 + seth