public EurekaEndpointGroupBuilder registryFetchIntervalMillis(long registryFetchIntervalMillis) {
        checkArgument(registryFetchIntervalMillis > 0, "registryFetchIntervalMillis: %s (expected: > 0)",
                      registryFetchIntervalMillis);
        this.registryFetchIntervalMillis = registryFetchIntervalMillis;
        return this;
    }
Sets the interval between fetching registry requests in milliseconds.
{@value #DEFAULT_REGISTRY_FETCH_INTERVAL_MILLIS} is used by default and it's not recommended to modify
this value. See
<a href="https://github.com/Netflix/eureka/wiki/Understanding-eureka-client-server-communication#fetch-registry">
fetch-registry</a>.
eureka/src/main/java/com/linecorp/armeria/client/eureka/EurekaEndpointGroupBuilder.java