void actionTerminated(const AspFluent& action) throw() {
     ROS_INFO_STREAM("Terminating execution: " << action.toString());
 }
 string operator()(const AspFluent& fluent) {
     stream << fluent.toString() << " ";
 }
 void actionStarted(const AspFluent& action) throw() {
     ROS_INFO_STREAM("Starting execution: " << action.toString());
 }
void ActionLogger::actionStarted(const AspFluent& action) throw() {
 
  if(dest_file) {
    (*dest_file) << action.toString() << " ";
  }
}