code: def AddStationDecoration(self, index, color="#f00"):
      
      tmpstr = str()
      num_stations = len(self._stations)
      ind = int(index)
      if self._stations:
        if 0<ind<num_stations:
          y = self._stations[ind]
          tmpstr = '<polyline class="Dec" stroke="%s" points="%s,%s,%s,%s" />' \
            % (color, 20, 20+y+.5, self._gwidth+20, 20+y+.5)
      self._decorators.append(tmpstr)
docs: Flushes existing decorations and highlights the given station-line.
  
      Args:
        # Integer, index of stop to be highlighted.
        index: 4
        # An optional string with a html color code
        color: "#fff"