code: def make_muc_admin_quey(self):
          
          self.clear_muc_child()
          self.muc_child=MucAdminQuery(parent=self.xmlnode)
          return self.muc_child
docs: Create <query xmlns="...muc#admin"/> element in the stanza.
  
          :return: the element created.
          :returntype: `MucAdminQuery`