presto-main/src/main/java/io/prestosql/sql/planner/EqualityInference.java/EqualityPartition/EqualityPartition
class EqualityPartition:        public EqualityPartition(Iterable<Expression> scopeEqualities, Iterable<Expression> scopeComplementEqualities, Iterable<Expression> scopeStraddlingEqualities)
        {
            this.scopeEqualities = ImmutableList.copyOf(requireNonNull(scopeEqualities, "scopeEqualities is null"));
            this.scopeComplementEqualities = ImmutableList.copyOf(requireNonNull(scopeComplementEqualities, "scopeComplementEqualities is null"));
            this.scopeStraddlingEqualities = ImmutableList.copyOf(requireNonNull(scopeStraddlingEqualities, "scopeStraddlingEqualities is null"));
        }