code: public final void stopApp() throws IOException {
          Application runningApp = getRunningApp();
          if (runningApp == null) {
              throw new ChromeCastException("No application is running in ChromeCast");
          }
          channel().stop(runningApp.sessionId);
      }
docs: <p>Stops currently running application</p>
  
  <p>If no application is running at the moment then exception is thrown.</p>
  
  @throws IOException