presto-thrift-api/src/main/java/io/prestosql/plugin/thrift/api/datatypes/PrestoThriftVarchar.java/PrestoThriftVarchar/getSizes
class PrestoThriftVarchar:    @Nullable
    @ThriftField(value = 2, requiredness = OPTIONAL)
    public int[] getSizes()
    {
        return sliceType.getSizes();
    }