code: protected void actionNext() {
  
          if (m_dialogIndex >= (m_resources.size() - 1)) {
              return;
          }
  
          m_dialogIndex++;
          m_uploadPropertyPanel.getPropertyEditor().getForm().validateAndSubmit();
          m_nextAction = new Runnable() {
  
              public void run() {
  
                  loadDialogBean(m_resources.get(m_dialogIndex));
              }
          };
      }
docs: Action to display the dialog content for the next resource.<p>