[Solved] fieldgroup options in delegate class ?

Hello,
I'm looking for a way to collapse (or not) one of my fieldgroup depending on some value.
Is there a function "myfieldgroup__collapsed" like there is a "myfield__default" one ?
Thanks a lot for you help.
I'm looking for a way to collapse (or not) one of my fieldgroup depending on some value.
Is there a function "myfieldgroup__collapsed" like there is a "myfield__default" one ?
Thanks a lot for you help.