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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 folders(self):
        '''gets the property value for folders'''
        if self._folders is None :
            self.__init()
        if self._folders is not None and isinstance(self._folders, list):
            if len(self._folders) == 0:
                self._loadFolders()
        return self._folders