public T addSkewedColName(String skewedColName) {
    if (skewedColNames == null) skewedColNames = new ArrayList<>();
    skewedColNames.add(skewedColName);
    return child;
  }
Builds a {@link StorageDescriptor}.  Only requires that columns be set.  It picks reasonable
defaults for everything else.  This is intended for use just by objects that have a StorageDescriptor,
not direct use.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/client/builder/StorageDescriptorBuilder.java