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# sfTimer starting and stopping
 -  returns the amount of  calls
 -  returns a value greater than zero. No precision is tested by the unit test to avoid false alarms
# sfTimerManager
 -  returns an sfTimer instance
 -  returns an array with the timers created by the timer manager
 -  returns an array with keys being the timer name
 -  empties the list of the timer instances
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