InMemoryEntryStore(){
  entries=Maps.newHashMap();
  topLevelEntries=Sets.newHashSet();
  children=HashMultimap.create();
}

InMemoryEntryStore ( ) { entries = Maps . newHashMap ( ) ; topLevelEntries = Sets . newHashSet ( ) ; children = HashMultimap . create ( ) ; }
creates a new inmemoryentrystore which provides constant time storage and retrieval of entries by id or parent id .
