How to change Symbol of export button in react native???

[disha-nimble]

i tried to change export button symbol using below code:
Highcharts.SVGRenderer.prototype.symbols.download = function (x, y, w, h) {
var path = [
// Arrow stem
'M', x + w * 0.5, y,
'L', x + w * 0.5, y + h * 0.7,
// Arrow head
'M', x + w * 0.3, y + h * 0.5,
'L', x + w * 0.5, y + h * 0.7,
'L', x + w * 0.7, y + h * 0.5,
// Box
'M', x, y + h * 0.9,
'L', x, y + h,
'L', x + w, y + h,
'L', x + w, y + h * 0.9
];
return path;
};
but i got an error of "Highcharts.SVGRenderer".