Documentation for recorded_session


I'm trying to get behind how to write my own generators. For this I
started to
analyze the code of some generators, e.g. restful_authentication and
there's one
functon I haven't found a documentation for: recorded_session

I have seen some of the functions which are provided through
recorded_session but
I would like to read the documentation for it to get an overview over
the whole functionality which is provided by recorded_session.

So, has anybody a link to the documentation of recorded_session or to
an other
site where the function is explained?
I've already searched the Rails documentation and on Google, but I
haven't found