code: public A_CmsTab getTab(GalleryTabId tabId) {
  
          for (A_CmsTab tab : m_tabbedPanel) {
              if (tabId == GalleryTabId.valueOf(tab.getTabId())) {
                  return tab;
              }
          }
          return null;
      }
docs: Gets the tab with a given tab id, or null if the dialog has no such tab.<p>
  
  @param tabId the tab id to look for
  
  @return the tab with the given tab id, or null