presto-orc/src/main/java/io/prestosql/orc/metadata/ColumnEncoding.java/ColumnEncoding/ColumnEncoding
class ColumnEncoding:    public ColumnEncoding(ColumnEncodingKind columnEncodingKind, int dictionarySize)
    {
        this.columnEncodingKind = requireNonNull(columnEncodingKind, "columnEncodingKind is null");
        this.dictionarySize = dictionarySize;
    }