docs: public InstantConverter getInstantConverter(Object object) {
          InstantConverter converter =
              (InstantConverter)iInstantConverters.select(object == null ? null : object.getClass());
          if (converter != null) {
              return converter;
          }
          throw new IllegalArgumentException("No instant converter found for type: " +
              (object == null ? "null" : object.getClass().getName()));
      }