src/main/java/org/apache/datasketches/kll/KllFloatsSketch.java [567:590]:
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    private void populateFromSketch(final float[] srcQuantiles, final int[] srcLevels,
        final int srcNumLevels, final int numItems) {
        final int[] myLevels = new int[srcNumLevels + 1];
        final int offset = srcLevels[0];
        System.arraycopy(srcQuantiles, offset, quantiles, 0, numItems);
        int srcLevel = 0;
        int dstLevel = 0;
        long weight = 1;
        while (srcLevel < srcNumLevels) {
          final int fromIndex = srcLevels[srcLevel] - offset;
          final int toIndex = srcLevels[srcLevel + 1] - offset; // exclusive
          if (fromIndex < toIndex) { // if equal, skip empty level
            Arrays.fill(cumWeights, fromIndex, toIndex, weight);
            myLevels[dstLevel] = fromIndex;
            myLevels[dstLevel + 1] = toIndex;
            dstLevel++;
          }
          srcLevel++;
          weight *= 2;
        }
        final int numLevels = dstLevel;
        blockyTandemMergeSort(quantiles, cumWeights, myLevels, numLevels); //create unit weights
        KllHelper.convertToCumulative(cumWeights);
      }
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src/main/java/org/apache/datasketches/kll/KllLongsSketch.java [568:591]:
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    private void populateFromSketch(final long[] srcQuantiles, final int[] srcLevels,
        final int srcNumLevels, final int numItems) {
      final int[] myLevels = new int[srcNumLevels + 1];
      final int offset = srcLevels[0];
      System.arraycopy(srcQuantiles, offset, quantiles, 0, numItems);
      int srcLevel = 0;
      int dstLevel = 0;
      long weight = 1;
      while (srcLevel < srcNumLevels) {
        final int fromIndex = srcLevels[srcLevel] - offset;
        final int toIndex = srcLevels[srcLevel + 1] - offset; // exclusive
        if (fromIndex < toIndex) { // if equal, skip empty level
          Arrays.fill(cumWeights, fromIndex, toIndex, weight);
          myLevels[dstLevel] = fromIndex;
          myLevels[dstLevel + 1] = toIndex;
          dstLevel++;
        }
        srcLevel++;
        weight *= 2;
      }
      final int numLevels = dstLevel;
      blockyTandemMergeSort(quantiles, cumWeights, myLevels, numLevels); //create unit weights
      KllHelper.convertToCumulative(cumWeights);
    }
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src/main/java/org/apache/datasketches/kll/KllDoublesSketch.java [568:591]:
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    private void populateFromSketch(final double[] srcQuantiles, final int[] srcLevels,
      final int srcNumLevels, final int numItems) {
      final int[] myLevels = new int[srcNumLevels + 1];
      final int offset = srcLevels[0];
      System.arraycopy(srcQuantiles, offset, quantiles, 0, numItems);
      int srcLevel = 0;
      int dstLevel = 0;
      long weight = 1;
      while (srcLevel < srcNumLevels) {
        final int fromIndex = srcLevels[srcLevel] - offset;
        final int toIndex = srcLevels[srcLevel + 1] - offset; // exclusive
        if (fromIndex < toIndex) { // if equal, skip empty level
          Arrays.fill(cumWeights, fromIndex, toIndex, weight);
          myLevels[dstLevel] = fromIndex;
          myLevels[dstLevel + 1] = toIndex;
          dstLevel++;
        }
        srcLevel++;
        weight *= 2;
      }
      final int numLevels = dstLevel;
      blockyTandemMergeSort(quantiles, cumWeights, myLevels, numLevels); //create unit weights
      KllHelper.convertToCumulative(cumWeights);
    }
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