var groups = {
        'canvas': ['canvas'],
        'rgba': ['rgba'],
        'hsla': ['hsla'],
        'multiplebgs': ['multiplebgs'],
        'borderimage': ['borderimage'],
        'borderradius': ['borderradius'],
        'boxshadow': ['boxshadow'],
        'opacity': ['opacity'],
        'cssanimations': ['cssanimations'],
        'csscolumns': ['csscolumns'],
        'cssgradients': ['cssgradients'],
        'cssreflections': ['cssreflections'],
        'csstransforms': ['csstransforms'],
        'csstransitions': ['csstransitions']
    };