code: private JsfFaceletDescriptor findJsfTemplateDescriptor(String templateFqn, String path, ScannerContext context) {
          String includedFile = absolutifyFilePath(path, templateFqn);
          return getJsfTemplateDescriptor(includedFile, context);
      }
docs: Try to find an existing {@link JsfFaceletDescriptor} with the given
  parameters.
  
  @param templateFqn
  full qualified name of the including file
  @param path
  the found path to the included file
  @param context
  The scanner context
  @return an existing {@link JsfFaceletDescriptor} or a new one if no
  descriptor exists.