HeapPop - safely pop item from a heap interface.

HeapPush - safely push item to a heap interface.

need to figure out best way to implement the lock time.

need to figure out best way to implement the lock time.

need to figure out best way to implement the lock time.

stopWatchHeapOps - stop watching for heap operations.

watchHeapOps - watch for push/pops to our heap, and serializing the operations with channels.

An Item is something we manage in a priority queue.