docs: public String get(Iterable<String> events, String defaultValue) {
          final Iterator<String> iter = getSeparate(events, defaultValue).iterator();
          StringBuilder builder = new StringBuilder();
          if (iter.hasNext()) {
              builder.append(iter.next());
              while (iter.hasNext()) {
                  builder.append(EVENT_LISTENER_DELIMITER);
                  builder.append(iter.next());
              }
          }
          return builder.toString();
      }