presto-jdbc/src/main/java/io/prestosql/jdbc/AbstractConnectionProperty.java/AbstractConnectionProperty/AbstractConnectionProperty
class AbstractConnectionProperty:    protected AbstractConnectionProperty(
            String key,
            Predicate<Properties> required,
            Predicate<Properties> allowed,
            Converter<T> converter)
    {
        this(key, Optional.empty(), required, allowed, converter);
    }