docs: function prepare (o) {
      try {
        var input = checkInput(o)
        var q = Queries.mkQuery(input)
  
        // we have win!
        return [q]
      } catch (err) {
        // other than spewing, we ignore errors
        console.error(err.stack)
  
        // so this request will be flatmapped away
        return []
      }
    }