message: added reference to const in enforce limits
diff: @@ -152,7 +152,7 @@ class FrankaHW : public hardware_interface::RobotHW {
  *
  * @param[in] kPeriod The duration of the current cycle
  */
  - void enforceLimits(const ros::Duration kPeriod);
  + void enforceLimits(const ros::Duration& kPeriod);
  private:
  using Callback =
  