Hello, i'm trying to have my class having some event callback like this :

class wmenuitem (fcallback:wmenuitem->unit) =
  object(self)
 val func = fcallback
 method activate = (func self)
  end

but I'm having :

This expression has type < activate : 'a; .. > but is here used with type
  wmenuitem = < .. >
Self type cannot escape its class

Is it really true that self cannot be a parameter ?
Any help ?
Thanks

Warp

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