presto-main/src/main/java/io/prestosql/sql/planner/optimizations/TransformQuantifiedComparisonApplyToCorrelatedJoin.java/TransformQuantifiedComparisonApplyToCorrelatedJoin/projectExpressions
class TransformQuantifiedComparisonApplyToCorrelatedJoin:        private ProjectNode projectExpressions(PlanNode input, Assignments subqueryAssignments)
        {
            Assignments assignments = Assignments.builder()
                    .putIdentities(input.getOutputSymbols())
                    .putAll(subqueryAssignments)
                    .build();
            return new ProjectNode(
                    idAllocator.getNextId(),
                    input,
                    assignments);
        }