instead of
MyVariable : my_device = my_device{}
It becomes
MyVariable : ?my_device = option{my_device{}}
But you will need to do if(MyDevice:=MyVariable?): before using it in a function since to use it it must not be false.
instead of
MyVariable : my_device = my_device{}
It becomes
MyVariable : ?my_device = option{my_device{}}
But you will need to do if(MyDevice:=MyVariable?): before using it in a function since to use it it must not be false.