src/assets/extensionArea.js
export default '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100px" height="80px" viewBox="0 0 510 310" preserveAspectRatio="xMidYMid meet" >' +
' <polyline style="stroke:black;fill:none;stroke-width:5px;" id="e1_polyline" points="55 5 5 5 5 305 55 305"/>' +
' <polyline style="stroke:black;fill:none;stroke-width:5px;" id="e2_polyline" points="455 5 505 5 505 305 455 305"/>' +
'</svg>'