How to avoid hard coding the node name prefixes while setting ros parameter ?

edit

I'm working on robot_localization package.

I have requirement now.

I want to set all the parameters as in this node test_ekf_localization_node_bag1_ekf in my main() function at the position /* set parameters here */ The main() is as follows:

int main(int argc, char** argv)
{
  ros::init(argc, argv, "ekf_node");

  ros::NodeHandle nh;
  ros::NodeHandle nh_priv("~");

  **/* set parameters here */**

  if (!nh.ok()) return 1;

  RobotLocalization::RosEkf ekf(nh, nh_priv);
  ekf.initialize();
  ros::spin();
}

However, If I want to do so, I need to prefix all the parameters with node name, which I don't want to do.

Example:

int main(int argc, char** argv)
{
  ros::init(argc, argv, "ekf_node");

  ros::NodeHandle nh;
  ros::NodeHandle nh_priv("~");

  nh.setParam("ekf_node/frequency", 30);
  nh.setParam("ekf_node/sensor_timeout", 0.1);
  nh.setParam("ekf_node/two_d_mode", false);

  RobotLocalization::RosEkf ekf(nh, nh_priv);
  ekf.initialize();
  ros::spin();
}

Any solution to avoid this prefix and set these parameters in main() here ?