presto-thrift-api/src/main/java/io/prestosql/plugin/thrift/api/valuesets/PrestoThriftRangeValueSet.java/PrestoThriftMarker/getValue
class PrestoThriftMarker:        @Nullable
        @ThriftField(value = 1, requiredness = OPTIONAL)
        public PrestoThriftBlock getValue()
        {
            return value;
        }