src/main/java/org/apache/datasketches/pig/quantiles/DataToDoublesSketch.java [330:343]:
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        final DataBag outerBag = (DataBag) inputTuple.get(0);
        for (final Tuple dataTuple: outerBag) {
          final Object f0 = dataTuple.get(0);
          if (f0 == null) { continue; }
          if (f0 instanceof DataBag) {
            final DataBag innerBag = (DataBag) f0; // inputTuple.bag0.dataTupleN.f0:bag
            if (innerBag.size() == 0) { continue; }
            // If field 0 of a dataTuple is a Bag all innerTuples of this inner bag
            // will be passed into the union.
            // It is due to system bagged outputs from multiple mapper Initial functions.
            // The Intermediate stage was bypassed.
            for (final Tuple innerTuple: innerBag) {
              final Object value = innerTuple.get(0);
              if (value != null) {
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src/main/java/org/apache/datasketches/pig/quantiles/DataToItemsSketch.java [318:331]:
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        final DataBag outerBag = (DataBag) inputTuple.get(0);
        for (final Tuple dataTuple: outerBag) {
          final Object f0 = dataTuple.get(0);
          if (f0 == null) { continue; }
          if (f0 instanceof DataBag) {
            final DataBag innerBag = (DataBag) f0; // inputTuple.bag0.dataTupleN.f0:bag
            if (innerBag.size() == 0) { continue; }
            // If field 0 of a dataTuple is a Bag all innerTuples of this inner bag
            // will be passed into the union.
            // It is due to system bagged outputs from multiple mapper Initial functions.
            // The Intermediate stage was bypassed.
            for (final Tuple innerTuple: innerBag) {
              final Object value = innerTuple.get(0);
              if (value != null) {
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