| Interface | Description | 
|---|---|
| MatchAheadOfTime | Implementators of this interface might provide elements to be matched "ahead of time". | 
| Class | Description | 
|---|---|
| AccessBasedLRUCache<K,V> | A Map acting like a LRU cache which will evict elements which have not been accessed in a while. | 
| ByTypeIndex | An implementation of EObjectIndex which segregates given EObjects using their type and then delegate to
 other indexes. | 
| ProximityIndex | This class is responsible for holding several version of EObjects from sides left, right or origins and
 provides the ability to return the closest instance (from a difference side) of a given EObject. | 
| ProximityMatchStats | A class responsible for tracking statistics about a given comparison process. | 
| WeightProviderDescriptorImpl | A simple implementation of  WeightProvider.Descriptorthat will delegate its method implementation
 to values given to its constructor. | 
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