func WithPanicResponse(body, contentType string) Option {
	return func(o *Handler) {
		o.panicBody = body
		o.panicContentType = contentType
	}
}
func WithPanicResponse(body, contentType string) Option {
	return func(o *Handler) {
		o.panicBody = body
		o.panicContentType = contentType
	}
}
// WithPanicResponse sets a fixed body and its content type HTTP header
// that will be returned as HTTP response on panic event.
// If WithPanicResponseHandler is defined, this options are ignored.