public HealthCheckServiceBuilder checkers(Iterable<? extends HealthChecker> healthCheckers) {
        this.healthCheckers.addAll(requireNonNull(healthCheckers, "healthCheckers"));
        return this;
    }
Adds the specified {@link HealthChecker}s that determine the healthiness of the {@link Server}.

@return {@code this}
core/src/main/java/com/linecorp/armeria/server/healthcheck/HealthCheckServiceBuilder.java