Demo of original attempt to use 'Safe' with a func/expression in another class.

This is close to what was my first instinct was when using this library. I had a dictionary of Funcs in a particular class (later converted to expressions) and I was trying to access them in a safe way. This works fine when using the `CompileChain` method (as long as I don't try to access a value type as discussed in a previous pull request). But fails when using the `Safe` method. Not sure if it is even possible for the `Safe` method to provide this functionality and since the `CompileChain` works, it might not even be necessary. Just wanted to provide more details about what I was trying to do. :-)