code: private static void compressHybridFlavor(final CompressedState target, final CpcSketch source) {
      final int srcK = 1 << source.lgK;
      final PairTable srcPairTable = source.pairTable;
      final int srcNumPairs = srcPairTable.getNumPairs();
      final int[] srcPairArr = PairTable.unwrappingGetItems(srcPairTable, srcNumPairs);
      introspectiveInsertionSort(srcPairArr, 0, srcNumPairs - 1);
      final byte[] srcSlidingWindow = source.slidingWindow;
      final int srcWindowOffset = source.windowOffset;
      final long srcNumCoupons = source.numCoupons;
      assert (srcSlidingWindow != null);
      assert (srcWindowOffset == 0);
      final long numPairs = srcNumCoupons - srcNumPairs; // because the window offset is zero
      assert numPairs < Integer.MAX_VALUE;
      final int numPairsFromArray = (int) numPairs;
  
      assert (numPairsFromArray + srcNumPairs) == srcNumCoupons; //for test
      final int[] allPairs
        = trickyGetPairsFromWindow(srcSlidingWindow, srcK, numPairsFromArray, srcNumPairs);
  
      PairTable.merge(srcPairArr, 0, srcNumPairs,
          allPairs, srcNumPairs, numPairsFromArray,
          allPairs, 0);  // note the overlapping subarray trick
  
      //FOR TESTING If needed
      //        for (int i = 0; i < (source.numCoupons - 1); i++) {
      //          assert (Integer.compareUnsigned(allPairs[i], allPairs[i + 1]) < 0); }
  
      compressTheSurprisingValues(target, source, allPairs, (int) srcNumCoupons);
    }
docs: of a Pinned sketch before compressing it. Hence the name Hybrid.