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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getCollectionClass(cls, name) : """Return the class object of a collection given its 'name'"""

        try :
            return cls.collectionClasses[name]
        except KeyError :
            raise KeyError( "There is no Collection Class of type: '%s'; currently supported values: [%s]" % (name, ', '.join(getCollectionClasses().keys())) )