 
     @client = null
     @watchers = {}
+    @variablePromises = {}
 
     @listVariables()
     @listFunctions()

        cell.text e.result
        dfd.resolve e.result
    , (e) =>
      cell.removeClass()
      cell.addClass 'icon icon-issue-opened text-error'
      dfd.reject()

    cell = @find('#spark-dev-cloud-variables [data-id=' + variableName + '] td:eq(2)')
    cell.addClass 'loading'
    cell.text ''
    promise = @variablePromises[variableName]
    if !!promise
      promise._handler.resolve()
    promise = spark.getVariable SettingsHelper.get('current_core'), variableName
    @variablePromises[variableName] = promise
    promise.done (e) =>
      if !e
        dfd.resolve null
        return
        
      delete @variablePromises[variableName]
      cell.removeClass()

      if !!e.ok
        cell.addClass 'icon icon-issue-opened text-error'
        dfd.reject()
