> example :: VoiceTwiml
> example =
>   response $ do
>     say "I will pause 10 seconds starting now!" def
>     pause $ def & duration .~ Just 10
>     say "I just paused 10 seconds" def
>     end
>   where Twiml.Syntax{..} = def

>>> show example
<?xml version="1.0" encoding="UTF-8"?>
<Response>
  <Say>I will pause 10 seconds starting now!</Say>
  <Pause length="10"/>
  <Say>I just paused 10 seconds</Say>
</Response>