presto-main/src/main/java/io/prestosql/cost/FilterStatsCalculator.java/FilterExpressionStatsCalculatingVisitor/process
class FilterExpressionStatsCalculatingVisitor:        @Override
        public PlanNodeStatsEstimate process(Node node, @Nullable Void context)
        {
            return normalizer.normalize(super.process(node, context), types);
        }