src/vs/workbench/contrib/debug/browser/replViewer.ts/ReplDataSource/getChildren
class ReplDataSource:	getChildren(element: IReplElement | IDebugSession): Promise<IReplElement[]> {
		if (isDebugSession(element)) {
			return Promise.resolve(element.getReplElements());
		}
		if (element instanceof RawObjectReplElement) {
			return element.getChildren();
		}
		if (element instanceof ReplGroup) {
			return Promise.resolve(element.getChildren());
		}

		return (<IExpression>element).getChildren();
	}