src/vs/editor/browser/viewParts/lines/viewLines.ts/ViewLines/onCursorStateChanged
class ViewLines:	public override onCursorStateChanged(e: viewEvents.ViewCursorStateChangedEvent): boolean {
		const rendStartLineNumber = this._visibleLines.getStartLineNumber();
		const rendEndLineNumber = this._visibleLines.getEndLineNumber();
		let r = false;
		for (let lineNumber = rendStartLineNumber; lineNumber <= rendEndLineNumber; lineNumber++) {
			r = this._visibleLines.getVisibleLine(lineNumber).onSelectionChanged() || r;
		}
		return r;
	}