API Annotation not generating for wrapper ( gin.HandlerFunc) router

[h96Coder]

1. Swagger UI is showing

   // @Summary     Show an demo
   // @Description get ok
   // @Router      /router/demo [get]
   func Demo(c *gin.Context) {
   c.JSON(200, gin.H{
       "message": "ok",
   })
   }

2. Swagger UI is not showing

// @Summary     Show an health
// @Description get ok
// @Router      /router/health [get]
func HealthCheckHandler() gin.HandlerFunc {
    return func(c *gin.Context) {
        c.JSON(200, gin.H{
            "message": "ok",
        })
    }
}

r.GET("/router/health", handler.HealthCheckHandler())

Please help me to generate json for point 2 router handler