code: function MultiPolygon(input){
      if(input && input.type === "MultiPolygon" && input.coordinates){
        extend(this, input);
      } else if(isArray(input)) {
        this.coordinates = input;
      } else {
        throw "Terraformer: invalid input for Terraformer.MultiPolygon";
      }
  
      this.type = "MultiPolygon";
    }
docs: /*
  GeoJSON MultiPolygon Class
  new MultiPolygon();
  new MultiPolygon([ [ [[x,y], [x1,y1]], [[x2,y2], [x3,y3]] ] ]);
  new MultiPolygon({
  type: "MultiPolygon",
  coordinates: [ [ [[x,y], [x1,y1]], [[x2,y2], [x3,y3]] ] ]
  });