code: public static <A> AttributeKey<A> createKey(
          String name,
          Class<A> type
      ) {
  
          return PredefinedKey.valueOf(name, type);
  
      }
docs: /*[deutsch]
  <p>Erzeugt einen neuen Attributschl&uuml;ssel. </p>
  
  @param   <A> generic immutable type of attribute value
  @param   name    name of attribute
  @param   type    type of attribute
  @return  new attribute key
  @since   3.13/4.10