presto-main/src/main/java/io/prestosql/sql/planner/optimizations/StreamPropertyDerivations.java/StreamProperties/unordered
class StreamProperties:        private StreamProperties unordered(boolean unordered)
        {
            if (unordered) {
                ActualProperties updatedProperies = null;
                if (otherActualProperties != null) {
                    updatedProperies = ActualProperties.builderFrom(otherActualProperties)
                            .unordered(true)
                            .build();
                }
                return new StreamProperties(
                        distribution,
                        partitioningColumns,
                        false,
                        updatedProperies);
            }
            return this;
        }