The objects in this prebuilt directory can be rebuilt
using the source archive hosted at

http://search.maven.org/remotecontent?filepath=com/google/guava/guava/13.0.1/guava-13.0.1-sources.jar

Source code repository:
http://code.google.com/p/guava-libraries/wiki/Release13
https://code.google.com/p/guava-libraries/