core/src/main/java/com/twitter/elephantbird/mapreduce/io/ProtobufWritable.java
public static <M extends Message> ProtobufWritable<M> newInstance(Class<M> tClass) {
    return new ProtobufWritable<M>(new TypeRef<M>(tClass){});
  }
public static <M extends Message> ProtobufWritable<M> newInstance(Class<M> tClass) {
    return new ProtobufWritable<M>(new TypeRef<M>(tClass){});
  }
Returns a ProtobufWritable for a given Protobuf class.