public ColumnFamilyHandle getColumnFamilyHandle(String columnFamilyName) {
    return handleMap.get(columnFamilyName);
  }
Note : Does not delete from underlying DB. Just closes the handle.

@param columnFamilyName Column Family Name
amoro-format-iceberg/src/main/java/org/apache/amoro/utils/map/RocksDBBackend.java