docs: public static CorrelationKey unmarshalCorrelationKey( String key ) {
          CorrelationKeyFactory factory = KieInternalServices.Factory.get().newCorrelationKeyFactory();
          if( key == null || key.isEmpty() ) {
             return factory.newCorrelationKey(Collections.EMPTY_LIST);
          }
          List<String> keys = new ArrayList<String>();
          for( String k : key.split(":") ) {
              keys.add(k);
          }
          return KieInternalServices.Factory.get().newCorrelationKeyFactory().newCorrelationKey(keys);
      }