code: public static CmsXmlContainerPage unmarshal(CmsObject cms, CmsFile file) throws CmsXmlException {
  
          return unmarshal(cms, file, true);
      }
docs: Factory method to unmarshal (read) a container page instance from a OpenCms VFS file
  that contains XML data.<p>
  
  <b>Warning:</b><br/>
  This method does not support requested historic versions, it always loads the
  most recent version. Use <code>{@link #unmarshal(CmsObject, CmsResource, ServletRequest)}</code>
  for history support.<p>
  
  @param cms the current cms object
  @param file the file with the XML data to unmarshal
  
  @return a container page instance unmarshalled from the provided file
  
  @throws CmsXmlException if something goes wrong