presto-parquet/src/main/java/io/prestosql/parquet/DictionaryPage.java/DictionaryPage/DictionaryPage
class DictionaryPage:    public DictionaryPage(Slice slice, int dictionarySize, ParquetEncoding encoding)
    {
        this(requireNonNull(slice, "slice is null"),
                slice.length(),
                dictionarySize,
                requireNonNull(encoding, "encoding is null"));
    }