can somebody explain @DB(txn=false)

[Darren Shepherd]

I see @DB(txn=false) a lot in the code.  The javadoc says "By marking 
txn=false the method is not surrounded with transaction code" but I 
can't find any code that backs up this claim.  I only can find the below 
code in com.cloud.utils.db.TransactionContextBuilder that seems to point 
to the fact that only the existence of @DB indicates a transaction.

    @Override
    public boolean needToIntercept(Method method) {
        DB db = method.getAnnotation(DB.class);
        if (db != null) {
            return true;
        }
        Class<?> clazz = method.getDeclaringClass();

        do {
            db = clazz.getAnnotation(DB.class);
            if (db != null) {
                return true;
            }
            clazz = clazz.getSuperclass();
        } while (clazz != Object.class && clazz != null);

        return false;
    }

I grep'd through the code for ".txn()" and never once found a reference 
to it.  Its is safe to assume the txn attribute on @DB is bogus?

Darren