public IcebergFindFiles planWith(ExecutorService newExecutorService) {
    this.executorService = newExecutorService;
    return this;
  }
Base results on files in the snapshot that was current as of a timestamp.

@param timestampMillis a timestamp in milliseconds
@return this for method chaining
amoro-format-iceberg/src/main/java/org/apache/iceberg/IcebergFindFiles.java