Plugin docs has example code with errors that should be in an example
On the page http://docs.cask.co/cdap/current/en/hydrator-manual/developing-plugins/index.html are numerous examples showing how to create a plugin. The code is all embedded in the rst source file, and has errors in it.
To prevent this in the future, all the code on this page should move to a new example that demonstrates how to use the code. Even it is not fully-formed as an example, it should be put in a package so that it gets built and tested.