seaweedfs/src/main/java/site/ycsb/db/seaweed/SeaweedClient.java [306:318]:
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  protected static String toJson(Map<String, ByteIterator> values)
          throws IOException {
    ObjectNode node = MAPPER.createObjectNode();
    Map<String, String> stringMap = StringByteIterator.getStringMap(values);
    for (Map.Entry<String, String> pair : stringMap.entrySet()) {
      node.put(pair.getKey(), pair.getValue());
    }
    JsonFactory jsonFactory = new JsonFactory();
    Writer writer = new StringWriter();
    JsonGenerator jsonGenerator = jsonFactory.createJsonGenerator(writer);
    MAPPER.writeTree(jsonGenerator, node);
    return writer.toString();
  }
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memcached/src/main/java/site/ycsb/db/MemcachedClient.java [290:302]:
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  protected static String toJson(Map<String, ByteIterator> values)
      throws IOException {
    ObjectNode node = MAPPER.createObjectNode();
    Map<String, String> stringMap = StringByteIterator.getStringMap(values);
    for (Map.Entry<String, String> pair : stringMap.entrySet()) {
      node.put(pair.getKey(), pair.getValue());
    }
    JsonFactory jsonFactory = new JsonFactory();
    Writer writer = new StringWriter();
    JsonGenerator jsonGenerator = jsonFactory.createJsonGenerator(writer);
    MAPPER.writeTree(jsonGenerator, node);
    return writer.toString();
  }
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