code: protected void actionBack() {
  
          if (m_dialogIndex <= 0) {
              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 previous resource.<p>