// MultiStack returns the best possible stack.Multi from the error or nil if
// one isn't found.
func MultiStack(err error) *stack.Multi {
switch err := err.(type) {
case *singleFrameError:
var m stack.Multi
m.Add(stack.Stack{err.frame})
return &m
case *singleStackError:
var m stack.Multi
m.Add(err.stack)
return &m
case *multiStackError:
return err.multiStack
}
return nil
}
