           """
         ,
           {
-            selectors: []
             commands: [
               ['lte', ['number', 10], ['number', 2]]
               ['eq', ['number', 2], ['number', 3]]

          """
        ,
          {
            selectors: ['::window']
            commands: [
              ['eq', ['get','[bottom]'], ['get$','height',['$reserved','window']]]
            ]

          """
        ,
          {
            commands: [
              ['eq',
                ['get', '[md-width]'],
