protected Comparator<? super Long> keyComparator() {
		return KEY_COMPARATOR;
	}
Get the key comparator

@implNote this is probably vestigial, left from when we attempted to allow customization of
          the primary key. This currently just gives the natural ordering of longs.

@return the comparator
Ghidra/Debug/ProposedUtils/src/main/java/ghidra/util/database/DBCachedObjectStore.java