Avoiding low-memory warning in preseed mode

[Fred Boiteux <fbpros@free.fr>]

    Hello,

When launching the install of a Debian Buster 10.1 on a VM with a small 
memory footprint (512Mb), I get a warning from the Debian installer 
about entering in low-memory mode. I would like to have a 
non-interactive installation using a preseed file, but I didn't found 
how to avoid this warning which blocks installation until I manually 
validates the message in console. I've digged on Internet, and tried 
following preseed paragraph, without success :


d-i lowmem/low note


Does someone can tell me which sentence is supposed to be used in 
preseed file to skip this manual validation ?


    Thanks,

        Fred.