presto-main/src/main/java/io/prestosql/operator/LookupJoinOperator.java/SpillInfoSnapshot/from
class SpillInfoSnapshot:        public static SpillInfoSnapshot from(LookupSourceLease lookupSourceLease)
        {
            return new SpillInfoSnapshot(
                    lookupSourceLease.hasSpilled(),
                    lookupSourceLease.spillEpoch(),
                    lookupSourceLease.getSpillMask());
        }