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