 
 # Several Google completion engines package XML responses in this way.
 class GoogleXMLRegexpEngine extends RegexpEngine
-  doNotCache: false # true (disbaled, experimental)
   parse: (xhr) ->
     for suggestion in xhr.responseXML.getElementsByTagName "suggestion"
       continue unless suggestion = suggestion.getAttribute "data"

      "http://suggestqueries.google.com/complete/search?client=youtube&ds=yt&xml=t&q=%s"

class Wikipedia extends RegexpEngine
  doNotCache: false # true (disbaled, experimental)
  # Example search URL: http://www.wikipedia.org/w/index.php?title=Special:Search&search=%s
  constructor: ->
    super [ new RegExp "^https?://[a-z]+\.wikipedia\.org/" ]

    regexps ?= [
      # We match the major English-speaking TLDs.
      new RegExp "^https?://[a-z]+\.google\.(com|ie|co\.uk|ca|com\.au)/"
      ]
    super regexps

