src/vs/editor/browser/viewParts/lines/viewLines.ts/ViewLines/_getViewLineDomNode
class ViewLines:	private _getViewLineDomNode(node: HTMLElement | null): HTMLElement | null {
		while (node && node.nodeType === 1) {
			if (node.className === ViewLine.CLASS_NAME) {
				return node;
			}
			node = node.parentElement;
		}
		return null;
	}