presto-thrift-api/src/main/java/io/prestosql/plugin/thrift/api/datatypes/PrestoThriftJson.java/PrestoThriftJson/getNulls
class PrestoThriftJson:    @Nullable
    @ThriftField(value = 1, requiredness = OPTIONAL)
    public boolean[] getNulls()
    {
        return sliceType.getNulls();
    }