| Class | Description | 
|---|---|
| ComparisonUtil | This utility class provides common methods for navigation over and querying of the Comparison model. | 
| DiffUtil | This utility class will be used to provide similarity implementations. | 
| Graph<E> | This structure will be used to maintain a undirected graph of elements. | 
| ReadOnlyGraph<E> | Read-only version of an already existing  Graph. | 
| SafeSubMonitor | An EMF  Monitorthat can be safely passed to clients because it will ignore calls toworked(int)anddone()to allow the caller to master the number of ticks consumed, whatever
 the clients do with the monitor. | 
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