@Override
  public String toString() {
    return "LookupOptions{"
        + "lruMaximumSize="
        + lruMaximumSize
        + ", writeRecordThreadNum="
        + writeRecordThreadNum
        + ", ttlAfterWrite="
        + ttlAfterWrite
        + ", blockCacheCapacity="
        + blockCacheCapacity
        + ", blockCacheNumShardBits="
        + blockCacheNumShardBits
        + "}";
  }
This class is used to configure lookup options.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common/src/main/java/org/apache/amoro/flink/lookup/LookupOptions.java