[ESS] Folding chunks in Sweave?

[Seth Falcon]

Hi,

Does anyone know of a way to "fold" code chunks in an Sweave (.Rnw)
file when using ESS?

Ideally, a given code chunk would be elided to just the first line,
something like:

      <<aCalculation1, results=hide, echo=FALSE>>= ...

Any ideas?

+ seth