docs: def wait_for_state_change(self, state: str, waitsec) -> str:
          """Wait for controller state change and return state"""
          payload = """<ns1:waitForControllerStateChange1
                       xmlns:ns1=\"utcs\" xsi:type=\"ns1:WSControllerState\">
                       <ns1:state xsi:type=\"xsd:string\">{state}</ns1:state>
                       </ns1:waitForControllerStateChange1>
                       <ns2:waitForControllerStateChange2
                       xmlns:ns2=\"utcs\" xsi:type=\"xsd:int\">
                       {wait}</ns2:waitForControllerStateChange2>
                       """.format(state=state, wait=waitsec)
          xdoc = self.connection.soap_action('/ws/ControllerService',
                                             'waitForControllerStateChange',
                                             payload)
          if xdoc:
              return xdoc.find(
                  './SOAP-ENV:Body/ns1:waitForControllerStateChange3/ns1:state',
                  IHCSoapClient.ihcns).text
          return False