t = handle.output;

    // limit handleAddOutput to display_data with EXEC_MIME_TYPE content only
    if ((output.output_type != "display_data") || (!Object.prototype.hasOwnProperty.call(output.data, EXEC_MIME_TYPE))) {
      return
    }

    const toinsert = output_area.element.find("." + CLASS_NAME.split(' ')[0]);

    if (output.metadata[EXEC_MIME_TYPE]["id"] !== undefined) {
      toinsert[toinsert.length - 1].firstChild.textContent = output.data[JS_MIME_TYPE];
      // store reference to embed id on o