presto-main/src/main/java/io/prestosql/sql/planner/LocalDynamicFilter.java/LocalDynamicFilter/toString
class LocalDynamicFilter:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("probeSymbols", probeSymbols)
                .add("buildChannels", buildChannels)
                .add("result", result)
                .add("partitionsLeft", partitionsLeft)
                .toString();
    }