code: def getContactCreationParameters(self):
          
          for contactType in self.getContactTypes():
              if contactType.allowMultipleContactItems:
                  descriptiveIdentifier = _descriptiveIdentifier(contactType)
                  yield liveform.ListChangeParameter(
                      contactType.uniqueIdentifier(),
                      contactType.getParameters(None),
                      defaults=[],
                      modelObjects=[],
                      modelObjectDescription=descriptiveIdentifier)
              else:
                  yield liveform.FormParameter(
                      contactType.uniqueIdentifier(),
                      liveform.LiveForm(
                          lambda **k: k,
                          contactType.getParameters(None)))
docs: Yield a L{Parameter} for each L{IContactType} known.
  
          Each yielded object can be used with a L{LiveForm} to create a new
          instance of a particular L{IContactType}.