presto-jdbc/src/main/java/io/prestosql/jdbc/AbstractConnectionProperty.java/AbstractConnectionProperty/getDriverPropertyInfo
class AbstractConnectionProperty:    @Override
    public DriverPropertyInfo getDriverPropertyInfo(Properties mergedProperties)
    {
        String currentValue = mergedProperties.getProperty(key);
        DriverPropertyInfo result = new DriverPropertyInfo(key, currentValue);
        result.required = isRequired.test(mergedProperties);
        return result;
    }