| IExtendedIndexIterator<IEntryCacheInfo> | FifoGroupsExtendedIndexHandler. establishScan(K startPos,
             short relation,
             K endPos,
             boolean endPosInclusive)establish a scan according to the relation given and startPos : the start-scan object ,  null
 means scan all values. | 
| IExtendedIndexIterator<IEntryCacheInfo> | FifoGroupsExtendedIndexHandler. establishScan(K startPos,
             short relation,
             K endPos,
             boolean endPosInclusive,
             boolean ordered)establish a scan according to the relation given and startPos : the start-scan object ,  null
 means scan all values. |