Custom Histogram doesn't show up on prometheus dashboard

[Manish G]

I am trying to add a merics in my pojo class, like explained here

static final Histogram requestLatency = Histogram.build()
        .name("my_cusotm_service_method_latency_seconds")
        .help("Request latency in seconds for my_cusotm_service

.").register();

...and then in method:

Histogram.Timer requestTimer = requestLatency.startTimer();

try{
....

}finally{
    requestTimer.observeDuration();
}

But on prometheus dashboard I see no such metrics.

Am I missing something here?

[Manish G]

I have also asked same here.