public boolean enoughContent() {
    return undersizedSegmentFileSize >= config.getTargetSize()
        && min1SegmentFileSize + min2SegmentFileSize <= config.getTargetSize();
  }
Segment files has enough content.

<p>1. The total size of all undersized segment files is greater than target size

<p>2. There are two undersized segment file that can be merged into one
amoro-format-iceberg/src/main/java/org/apache/amoro/optimizing/plan/CommonPartitionEvaluator.java