code: function UMLExtensionView() {
          UMLGeneralEdgeView.apply(this, arguments);
          this.tailEndStyle = Core.ES_FLAT;
          this.headEndStyle = Core.ES_SOLID_ARROW;
          this.lineMode = Core.LM_SOLID;
      }
docs: UMLExtensionView
  @constructor
  @extends UMLGeneralEdgeView