appendInto(container) {
        this.startNode = container.appendChild(Object(_template_js__WEBPACK_IMPORTED_MODULE_5__["createMarker"])());
        this.endNode = container.appendChild(Object(_template_js__WEBPACK_IMPORTED_MODULE_5__["createMarker"])());
    }
Appends this part into a container.

This part must be empty, as its contents are not automatically moved.