code: function (map) {
              this._parts = [];
              var startAngle = 0;
              var stopAngle = 0;
  
              this.addTo(map);
  
              for (var i = 0; i < this.count(); i++) {
                  var normalized = this._normalize(this._data[i].num);
  
                  stopAngle = normalized * 360 + startAngle;
  
                  // set start/stop Angle and color for semicircle
                  var options = L.extend({
                      startAngle: startAngle,
                      stopAngle: stopAngle,
  
                      radius: this.options.radius,
                      fillColor: this._color(i),
                      color: this._color(i)
                  }, this.options.sliceOptions);
  
                  this._data[i].slice = L.semiCircle(
                      this._latlng,
                      L.Util.extend({}, options, this.options.pathOptions)
                  ).addTo(this);
  
                  if (this.options.labels) {
                      this._createLabel(normalized, this._data[i].label, this._data[i].slice);
                  }
                  startAngle = stopAngle;
              }
              return this;
          }
docs: layer implementation.