source for snapshot? 4.0 javacvs vs 5.0 javacvs?

Hi,

I downloaded the lib org-netbeans-lib-cvsclient-40.jar
and I tried to match source code to it so that I could
step into the code when debugging.  Is there a cvs tag
or branch that will get me the source code associated
with this release?

Also, I've noticed that this library is associated
with 4.0 is there a cvs library that is associated
with 5.0 that functions similarly?

Thanks,

Mike

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