boolean isExpired(long eventTime) {
			long elapsed = eventTime - lastAccessedTime;
			return elapsed >= lifetime;

		}
Called when an item's cache time has expired to determine if the item should be removed from
the cache. The default behavior is to remove an item when its time has expired. Subclasses can
override this method to have more control over expiring value removal.
<P>
Note: this method will always be called from within a synchronized block. Subclasses should
be careful if they make any external calls from within this method.

@param key the key of the item whose time has expired
@param value the value of the item whose time has expired
@return true if the item should be removed, false otherwise
Ghidra/Framework/Generic/src/main/java/ghidra/util/timer/GTimerCache.java