code: public void setExportHeader(String exportHeader) {
  
          if (CmsStringUtil.splitAsArray(exportHeader, ':').length == 2) {
              if (CmsLog.INIT.isInfoEnabled()) {
                  CmsLog.INIT.info(Messages.get().getBundle().key(Messages.INIT_EXPORT_HEADERS_1, exportHeader));
              }
              m_exportHeaders.add(exportHeader);
          } else {
              if (CmsLog.INIT.isWarnEnabled()) {
                  CmsLog.INIT.warn(Messages.get().getBundle().key(Messages.INIT_INVALID_HEADER_1, exportHeader));
              }
          }
      }
docs: Sets specific http header for the static export.<p>
  
  The format of the headers must be "header:value".<p>
  
  @param exportHeader a specific http header