code: def committee_object(self):
          '''If the committee id no longer exists in mongo for some reason,
          this function returns None.
          '''
          if 'committee_id' in self:
              _id = self['committee_id']
              return self.document._old_roles_committees.get(_id)
          else:
              return self committee_object(self):
          '''If the committee id no longer exists in mongo for some reason,
          this function returns None.
          '''
          if 'committee_id' in self:
              _id = self['committee_id']
              return self.document._old_roles_committees.get(_id)
          else:
              return self
docs: If the committee id no longer exists in mongo for some reason,
          this function returns None.