def clear(self):
self._storage = StorageRegistry.get(self.use_storage)()
self._lexicon = LexiconRegistry.get(self.use_lexicon)(truncate_left=self.truncate_left)
# check for converter modules
import StandardLexicon
from Products.TextIndexNG2.Registry import LexiconRegistry
LexiconRegistry.register('StandardLexicon', StandardLexicon.Lexicon)