code: public Document loadDocumentQuiet(GraphRewrite event, EvaluationContext context, XmlFileModel model)
      {
          try
          {
              return loadDocument(event, context, model);
          }
          catch(Exception ex)
          {
              return null;
          }
      }
docs: Loads and parses the provided XML file. This will quietly fail (not throwing an {@link Exception}) and return
  null if it is unable to parse the provided {@link XmlFileModel}. A {@link ClassificationModel} will be created to
  indicate that this file failed to parse.
  
  @return Returns either the parsed {@link Document} or null if the {@link Document} could not be parsed