Open Source?

Are the native component's scripts open source?  That is, can I look at the exact script with defines, say, the evaluate surface component.  

Though most of the components are just wrappers for rhino On class methods, it would be nice to see whats under the hood for experimentation.  And it would also be a great learning tool for beginning scripting in GH.

If the source code is available, can you post the location and if not, maybe it could be something to think about, even if the documentation is abridged.