presto-main/src/main/java/io/prestosql/sql/planner/iterative/rule/PushDownNegationsExpressionRewriter.java/PushDownNegationsExpressionRewriter/Visitor
class PushDownNegationsExpressionRewriter:        public Visitor(Metadata metadata)
        {
            this.metadata = requireNonNull(metadata, "metadata is null");
        }