docs: def add_to_public_members(self, public_member):
          """
          :calls: `PUT /orgs/:org/public_members/:user <http://developer.github.com/v3/orgs/members>`_
          :param public_member: :class:`github.NamedUser.NamedUser`
          :rtype: None
          """
          assert isinstance(public_member, github.NamedUser.NamedUser), public_member
          headers, data = self._requester.requestJsonAndCheck(
              "PUT",
              self.url + "/public_members/" + public_member._identity
          )