src/vs/editor/browser/controller/mouseTarget.ts/ElementPath/isChildOfScrollableElement
class ElementPath:	public static isChildOfScrollableElement(path: Uint8Array): boolean {
		return (
			path.length >= 2
			&& path[0] === PartFingerprint.OverflowGuard
			&& path[1] === PartFingerprint.ScrollableElement
		);
	}