private boolean isServerHealthy() {
        for (HealthChecker healthChecker : serverHealthCheckers) {
            if (!healthChecker.isHealthy()) {
                return false;
            }
        }
        return true;
    }
Returns a new builder which builds a new {@link GrpcHealthCheckService}.
grpc/src/main/java/com/linecorp/armeria/server/grpc/GrpcHealthCheckService.java