     super()
     @_$el = $ el
     @_isEmpty = false
-  isSame: (el) -> @_$el[0] is el[0]
+  isSame: ($el) ->
+    for el in $el
+      return true if $.contains(el, @_$el[0]) or el is @_$el[0]
+    false
   isEmpty: -> @_isEmpty
   toString: -> @constructor.name
   toMarkdown: -> @identifier

      return false unless token.isEmpty()
    true
  filter: (el) ->
    childTokens = []
    for token in @childTokens
      if token instanceof Chunk
        unless token.isSame el
          continue
        else
          childTokens.push token
      else
        token.filter el
        continue if token.isEmpty()
        childTokens.push token
    @childTokens = childTokens

    $messages = $el.filter('.message').add($el.find('.message'))
    if $messages.length is 0
      $messages = $el.parents '.message'
      console.log $messages.length
      return if $messages.length is 0
      root = @tokenizeMessages $messages
      console.log 'before filter:', root.toString()
      root.filter $el
      console.log 'after filter :', root.toString()
      return root

    @tokenizeMessages $messages
