presto-thrift-api/src/main/java/io/prestosql/plugin/thrift/api/PrestoThriftNullableColumnSet.java/PrestoThriftNullableColumnSet/PrestoThriftNullableColumnSet
class PrestoThriftNullableColumnSet:    @ThriftConstructor
    public PrestoThriftNullableColumnSet(@Nullable Set<String> columns)
    {
        this.columns = columns;
    }