This trait provides Timer functionalities based on the Java Calendar milliseconds
add 2 timers together
this method can be overridden for testing
a formatted string showing the hours, minutes and seconds
a tuple with the elapsed hours, minutes, seconds and millis
true if this timer has been started
true if this timer has never been started
restarts the Timer with no elapsed time
starts the with new elapsed time
Stop the timer, store the number of elapsed millis and return a String representing the time as hour/minute/second/ms
the elapsed time as a Long representing milliseconds
a formatted string showing the hours, minutes, seconds and millis
elapsed times since for each stop
each time the timer is started we add the current time to this list of times number of millis when instantiating the object using this Trait