code: static IdentityTemplateLibrary loadFromResource(String resource) {
          InputStream in = IdentityTemplateLibrary.class.getResourceAsStream(resource);
          try {
              return load(in);
          } catch (IOException e) {
              throw new IllegalArgumentException("Could not load template library from resource " + resource, e);
          } finally {
              try {
                  if (in != null) in.close();
              } catch (IOException e) {
                  // ignored
              }
          }
      }
docs: Load a template library from a resource on the class path.
  
  @return loaded template library
  @throws java.lang.IllegalArgumentException resource not found or could not be loaded