public OptionalInt getEmptyBlockPeriodSeconds() {
    // It can be 0 to disable custom empty block periods
    return JsonUtil.getInt(forkConfigRoot, EMPTY_BLOCK_PERIOD_SECONDS_KEY);
  }
Gets empty block period seconds.

@return the empty block period seconds
config/src/main/java/org/hyperledger/besu/config/BftFork.java