armem_robot_state/client/common/VirtualRobotReader: nodiscard for return value

source/RobotAPI/libraries/armem_robot_state/client/common/VirtualRobotReader.h

@@ -49,13 +49,13 @@ namespace armarx::armem::robot_state
 
         bool synchronizeRobot(VirtualRobot::Robot& robot, const armem::Time& timestamp);
 
-        VirtualRobot::RobotPtr
+        [[nodiscard]] VirtualRobot::RobotPtr
         getRobot(const std::string& name,
                  const armem::Time& timestamp,
                  const VirtualRobot::RobotIO::RobotDescription& loadMode =
                      VirtualRobot::RobotIO::RobotDescription::eStructure);
 
-        VirtualRobot::RobotPtr
+        [[nodiscard]] VirtualRobot::RobotPtr
         getSynchronizedRobot(const std::string& name,
                              const armem::Time& timestamp,
                              const VirtualRobot::RobotIO::RobotDescription& loadMode =