lang/java/mapred/src/main/java/org/apache/avro/hadoop/io/AvroSerialization.java [256:280]:
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  public static Class<? extends GenericData> getDataModelClass(Configuration conf) {
    return conf.getClass(CONF_DATA_MODEL, ReflectData.class, GenericData.class);
  }

  private static GenericData newDataModelInstance(Class<? extends GenericData> modelClass, Configuration conf) {
    GenericData dataModel;
    try {
      Constructor<? extends GenericData> ctor = modelClass.getDeclaredConstructor(ClassLoader.class);
      ctor.setAccessible(true);
      dataModel = ctor.newInstance(conf.getClassLoader());
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
    ReflectionUtils.setConf(dataModel, conf);
    return dataModel;
  }

  /**
   * Gets an instance of data model implementation, defaulting to
   * {@link ReflectData} if not explicitly specified.
   *
   * @param conf The job configuration.
   * @return Instance of the job data model implementation.
   */
  public static GenericData createDataModel(Configuration conf) {
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lang/java/mapred/src/main/java/org/apache/avro/mapred/AvroJob.java [210:227]:
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  public static Class<? extends GenericData> getDataModelClass(Configuration conf) {
    return conf.getClass(CONF_DATA_MODEL, ReflectData.class, GenericData.class);
  }

  private static GenericData newDataModelInstance(Class<? extends GenericData> modelClass, Configuration conf) {
    GenericData dataModel;
    try {
      Constructor<? extends GenericData> ctor = modelClass.getDeclaredConstructor(ClassLoader.class);
      ctor.setAccessible(true);
      dataModel = ctor.newInstance(conf.getClassLoader());
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
    ReflectionUtils.setConf(dataModel, conf);
    return dataModel;
  }

  public static GenericData createDataModel(Configuration conf) {
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