determining if class already exists

I believe there is a Moose function which tells you if a class already is loaded but I can't find it in the docs  any pointers would be much appreciated

Thanks in advance

Mark

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• determining if class already exists by Mark Wood-Patrick
• Re: determining if class already exists by Buddy Burden
• Re: determining if class already exists by Dave Rolsky
• determining if class already exists by Mark Wood-Patrick