From: Marc Heiler <lists@...>
Date: 2012-03-24T10:07:13+09:00
Subject: Re: What’s the best way to check if a feature/class has been loaded?

You guys seemed to talk about different things, one talking about cats, 
the other one about dogs... :P

I think the question could have been simplified though, it was a bit 
generic:

"What’s the best way to check if a feature/class has been loaded?"

When my brain notices that, it gets confused... it knows what a class 
is, but what is a feature? EVERYTHING, even bugs, can be a feature. :D

I never used "defined?" in my code so far, I feel it is very inelegant.

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