public HandlebarsViewEngine(IHandlebarsRendering handlebarsRendering,
                             IOptions <HandlebarsViewEngineOptions> optionsAccessor)
 {
     _options             = optionsAccessor.Value;
     _handlebarsRendering = handlebarsRendering;
 }
 public HandlebarsViewEngine(IOptions <HandlebarsViewEngineOptions> optionsAccessor)
 {
     _options = optionsAccessor?.Value ?? throw new ArgumentNullException(nameof(optionsAccessor));
 }