public BodilessResponsesMiddleware(RequestDelegate next)
 {
     _options = new BodilessOptions {
         RequiredHeader = "Discard-Body", RequiredValue = "true"
     };
     _next = next;
 }
 public BodilessResponsesMiddleware(RequestDelegate next, BodilessOptions options = null)
 {
     _options = options;
     _next    = next;
 }