public byte[] getHistogram() {
    setHistogram(org.apache.thrift.TBaseHelper.rightSize(histogram));
    return histogram == null ? null : histogram.array();
  }
Returns true if field bitVectors is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/DoubleColumnStatsData.java