code: function(url) {
    var done = _onImportScript(url)
    loadScript(
      url,
      function runScript(err, code) {
        if (err) return done(err)
        executeJailed(code, url, done)
      }
    )
  }
docs: Loads and executes the JavaScript file with the given url in a
  jailed environment
  
  @param {String} url of the script to load