| Interface | Description | 
|---|---|
| CellSearcher | Methods for seeking to a random  Cellinside a sorted collection of cells. | 
| ReversibleCellScanner | An extension of CellScanner indicating the scanner supports iterating backwards through cells. | 
| Enum | Description | 
|---|---|
| CellScannerPosition | An indicator of the state of the scanner after an operation such as nextCell() or
 positionAt(..). | 
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