code: def get(self, key):
          
          modcommit = self._get_modcommit(key)
          if not modcommit: return None
          # If this isn't a ForeignKey, then just return the value
          if key not in self.foreignkeys:
              return cPickle.loads(str(modcommit.value))
          # If it is, then return the object instance
          try:
              return TimeMachine(uid = modcommit.value).get_object()
          except self.content_type.DoesNotExist:
              raise DisciplineException("When restoring a ForeignKey, the " \
                  "%s %s was not found." % (self.content_type.name, self.uid))
docs: Return the value of a field.
          
          Take a string argument representing a field name, return the value of
          that field at the time of this TimeMachine. When restoring a 
          ForeignKey-pointer object that doesn't exist, raise 
          DisciplineException