code: protected void updateContent(CmsSitemapClipboardData data) {
  
          if (data == null) {
              return;
          }
          m_modified.clearList();
          boolean hasElements = false;
          for (CmsClientSitemapEntry entry : data.getModifications().values()) {
              m_modified.insertItem(createModifiedItem(entry), 0);
              hasElements = true;
          }
          m_clipboardButton.enableClearModified(hasElements);
          m_deleted.clearList();
          hasElements = false;
          for (CmsClientSitemapEntry entry : data.getDeletions().values()) {
              m_deleted.insertItem(createDeletedItem(entry), 0);
              hasElements = true;
          }
          m_clipboardButton.enableClearDeleted(hasElements);
      }
docs: Updates the clip board content.<p>
  
  @param data the clip board data