People do this in Ruby, and it can be fairly useful when building distributed systems. Another approach is to make something like
(load 'foobar)
Check all the local codepaths for foobar, and if those fail then check the remote codepaths. An example of this approach was used in my projects, here's a link to the code that did it in ruby: http://github.com/KirinDave/fuzed/tree/376747981d7801d3e8ba2...
