code: public static Writable deserializeFromString(Class<? extends Writable> writableClass, String serializedWritableStr)
        throws IOException {
      return deserializeFromString(writableClass, serializedWritableStr, new Configuration());
    }
docs: Deserialize a {@link Writable} object from a string.
  
  @param writableClass the {@link Writable} implementation class
  @param serializedWritableStr the string containing a serialized {@link Writable} object
  @return a {@link Writable} deserialized from the string
  @throws IOException if there's something wrong with the deserialization