question: @ Override public DoubleDBIDList reverseKNNQuery ( DBIDRef id , int k ) { if ( k > settings . kmax ) { throw new IllegalArgumentException ( "Parameter k has to be less or equal than " + "parameter kmax of the MCop-Tree!" ) ; } ModifiableDoubleDBIDList result = DBIDUtil . newDistanceDBIDList ( ) ; ModifiableDBIDs candidates = DBIDUtil . newArray ( ) ; doReverseKNNQuery ( k , id , result , candidates ) ; Map < DBID , KNNList > knnLists = batchNN ( getRoot ( ) , candidates , k ) ; result . sort ( ) ; for ( DBIDIter iter = candidates . iter ( ) ; iter . valid ( ) ; iter . advance ( ) ) { DBID cid = DBIDUtil . deref ( iter ) ; KNNList cands = knnLists . get ( cid ) ; for ( DoubleDBIDListIter iter2 = cands . iter ( ) ; iter2 . valid ( ) ; iter2 . advance ( ) ) { if ( DBIDUtil . equal ( id , iter2 ) ) { result . add ( iter2 . doubleValue ( ) , cid ) ; break ; } } } result . sort ( ) ; return result ; }
target:  Performs a reverse k-nearest neighbor query for the given object ID. The query result is in ascending order to the distance to the query object.