code: public M sequence(String sequenceKey, Long initialValue, Boolean increment) {
          SequenceConfig cfg = defaultSequenceConfig();
          if (null != initialValue) {
              cfg.setInitialValue(initialValue);
          }
          if (null != increment) {
              cfg.setDecrement(!increment);
          }
          getSequence(sequenceKey, cfg);
          return THIS();
      }
docs: Configuration a Sequence instance with frequently-used property
  @see Berkeley#sequence(String, SequenceConfig)