presto-main/src/main/java/io/prestosql/sql/planner/ExpressionInterpreter.java/ExpressionInterpreter/types
class ExpressionInterpreter:        private List<Type> types(List<Expression> expressions)
        {
            return expressions.stream()
                    .map(NodeRef::of)
                    .map(expressionTypes::get)
                    .collect(toImmutableList());
        }