code: function(series){
  
      function drawChart (series, typeKey) {
        var options = this.getOptions(series, typeKey);
        this[typeKey].draw(options);
      }
  
      var drawn = false;
      series = series || this.series;
  
      _.each(flotr.graphTypes, function (type, typeKey) {
        if (series[typeKey] && series[typeKey].show && this[typeKey]) {
          drawn = true;
          drawChart.call(this, series, typeKey);
        }
      }, this);
  
      if (!drawn) drawChart.call(this, series, this.options.defaultType);
    }
docs: Actually draws the graph.
  @param {Object} series - series to draw