How to use the react-digraph.GraphView.defaultProps function in react-digraph

return;
		}

		const idVar = edge.target ? `${edge.source}-${edge.target}` : 'custom';
		const id = `edge-${idVar}`;
		const element = this.getEdgeComponent(edge, nodeMoving);
		this.renderEdge(id, element, edge, nodeMoving);

		if (this.isEdgeSelected(edge)) {
			const container = document.querySelector(`#${id}-container`);
			container.parentNode.append(container);
		}
	}
}

GraphView.defaultProps = merge(GraphViewBase.defaultProps, {
	layoutEngineType: null,
});

class Node extends NodeBase {
	constructor(props) {
		super(props);

		Object.assign(this, {
			_super_handleDragStart: this.handleDragStart,
			handleDragStart: this.constructor.prototype.handleDragStart.bind(this),

			_super_handleDragEnd: this.handleDragEnd,
			handleDragEnd: this.constructor.prototype.handleDragEnd.bind(this),

			handleMouseDown: this.constructor.prototype.handleMouseDown.bind(this),
		});