docs: def createPerson(self, nickname, vip=_NO_VIP):
          """
          Create a new L{Person} with the given name in this organizer.
  
          @type nickname: C{unicode}
          @param nickname: The value for the new person's C{name} attribute.
  
          @type vip: C{bool}
          @param vip: Value to set the created person's C{vip} attribute to
          (deprecated).
  
          @rtype: L{Person}
          """
          for person in (self.store.query(
                  Person, attributes.AND(
                      Person.name == nickname,
                      Person.organizer == self))):
              raise ValueError("Person with name %r exists already." % (nickname,))
          person = Person(
              store=self.store,
              created=extime.Time(),
              organizer=self,
              name=nickname)
  
          if vip is not self._NO_VIP:
              warn(
                  "Usage of Organizer.createPerson's 'vip' parameter"
                  " is deprecated",
                  category=DeprecationWarning)
              person.vip = vip
  
          self._callOnOrganizerPlugins('personCreated', person)
          return person