Does Notmuch employ a '.noupdate'-like feature?

[Johnny Utahh]

On 7/14/15, 2:32 AM, David Bremner wrote:
> Johnny Utahh <notmuchmail.org at johnnyutahh.com> writes:
>
>> Does Notmuch employ a '.noupdate'-like feature?  Details:
>> https://github.com/djcb/mu/issues/22
>>
> Maybe new.ignore (man notmuch-config) can serve roughly the same
> purpose.

Thanks. Will files and directories that were previously 'notmuch new' 
searched and newly-assigned to new.ignore still be indexed?

I understand that any email messages added after said files/directories 
are assigned to new.ignore will not be discovered.