SelectAll checkbox in GridTable with FE

[#1]

Hello,

I try to activate the selectall checkbox on a GridTable in objectpage with manifest (Fiori Elements app odata V4)

By default, it is deselectall. 

I have tested a lot of possible combinations with the following attributes

Based on the interesting sap documentations

https://ui5.sap.com//#/topic/116b5d82e8c545e2a56e1b51b8b0a9bd

https://experience.sap.com/fiori-design-web/v1-120/grid-table/#multitoggle-

...

But always without success...

If someone has the magic combination to advise me? (no problem with ResponsiveTable but wanted GridTable)

My SAPUI5 version is 1.120.0 

Thanks in advance.

Best regards