code: public static void registerHelper(ConfigurationExtensionBuilder builder, String name, Helper helper) {
          Checker.checkArgumentsNotNull(builder, name, helper);
          try {
              builder.registerHelper(name, helper);
          } catch (IllegalArgumentException ignored) {
          }
      }
docs: Register helpers and do nothing if a helper with the same name is already registered.
  
  @param builder
  @param name
  @param helper