How to hide document types from one name space to another while creating documents

Experience Manager (PaaS/OnPrem)
1

we have requirement to hide document types from one name space to another while creating documents.

Ex: I have namespaces A & B, under A i have created document types, under B also i have created document types.

while creating new document under A namespace from hippo UI, i am able to see all document types from A & B. i would like to see only document types related to A not from B.

how to restrict this, kindly help us.

i tried below one didn’t help…

https://documentation.bloomreach.com/14/library/concepts/document-types/control-the-allowed-document-types-in-a-folder.html

thanks in advance
Ganesh