:memo: Add None shape hint for the placeholder
:memo: Add None shape hint for the placeholder

alvaroing12/CADL,alvaroing12/CADL,pkmital/CADL,goddoe/CADL,goddoe/CADL,niazangels/CADL,pkmital/CADL,padipadou/CADL,niazangels/CADL,padipadou/CADL