func (c *ComposedHandler) callRcv(h bh.Handler, msg bh.Msg, ctx bh.RcvContext) (
err error) {
defer func() {
r := recover()
if r == nil {
return
}
if d, ok := r.(time.Duration); ok {
ctx.Snooze(d)
}
err = errors.New(fmt.Sprintf("%v", r))
}()
return h.Rcv(msg, ctx)
}
