Render endArrow as an SVG image

[monolithed]

Hi, could someone explain how to render endArrow as an SVG image?

    G6.registerEdge('flow-line', {
        draw(config, group) {
            const {
                endPoint,
                startPoint,
                style
            } = config;

            const shape = group.addShape('path', {
                attrs: {
                    stroke: '#4f93ff',
                    endArrow: {
                        path: G6.Arrow.circle(4, 25),
                        fill: '#FFFFFF',
                        d: 10
                    },
                    path: [
                        [
                            'M',
                            startPoint.x,
                            startPoint.y
                        ],
                        [
                            'L',
                            startPoint.x,
                            (startPoint.y + endPoint.y) / 2
                        ],
                        [
                            'L',
                            endPoint.x,
                            (startPoint.y + endPoint.y) / 2
                        ],
                        [
                            'L',
                            endPoint.x,
                            endPoint.y
                        ]
                    ]
                }
            });

            return shape;
        }
    });

<?xml version="1.0" encoding="iso-8859-1"?>
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
	 viewBox="0 0 473.654 473.654" style="enable-background:new 0 0 473.654 473.654;" xml:space="preserve">
<circle style="fill:#6EC2CB;" cx="236.827" cy="236.827" r="236.827"/>
<path style="fill:#FFFFFF;" d="M331.416,180.767c-29.236,29.236-58.476,58.476-87.712,87.715 c-29.307-29.307-58.618-58.618-87.925-87.929c-25.56-25.564-65.08,14.259-39.456,39.883c35.885,35.885,71.766,71.77,107.651,107.655 c10.841,10.845,28.907,10.549,39.666-0.213c35.885-35.885,71.766-71.77,107.651-107.655 C396.859,194.66,357.036,155.14,331.416,180.767z"/>
</svg>