pauseTracking function
void Function()
pauseTracking()
Implementation
void Function() pauseTracking() {
system.pauseStack.add(system.activeSub);
system.activeSub = null;
return resumeTracking;
}
void Function() pauseTracking() {
system.pauseStack.add(system.activeSub);
system.activeSub = null;
return resumeTracking;
}