code: public CmsGalleryTabConfiguration withDefault(GalleryTabId defaultTab) {
  
          CmsGalleryTabConfiguration result = new CmsGalleryTabConfiguration(m_tabs);
          result.m_defaultTab = defaultTab;
          return result;
      }
docs: Creates a new tab configuration based on this one, but changes its default tab.<P>
  
  @param defaultTab the new default tab
  @return the copy with the changed default tab