code: public static LanguageExtension findFirst(Collection<? extends Extension> extensions)
      {
          for (Extension extension : extensions)
          {
              if (LANGUAGE_EXTENSION_ID == extension.getId())
                  return (LanguageExtension)extension;
          }
          return null;
      }
docs: Returns the first LanguageExtension found in the given collection of extensions,
  or null if the extension collection does not contain a LanguageExtension.