src/vs/workbench/api/browser/mainThreadEditor.ts/MainThreadTextEditorProperties/_optionsEqual
class MainThreadTextEditorProperties:	private static _optionsEqual(a: IResolvedTextEditorConfiguration, b: IResolvedTextEditorConfiguration): boolean {
		if (a && !b || !a && b) {
			return false;
		}
		if (!a && !b) {
			return true;
		}
		return (
			a.tabSize === b.tabSize
			&& a.indentSize === b.indentSize
			&& a.insertSpaces === b.insertSpaces
			&& a.cursorStyle === b.cursorStyle
			&& a.lineNumbers === b.lineNumbers
		);
	}