code: public T load(H hashKey, R rangeKey) {
          return mapper.<T>load(model.targetType(), hashKey, rangeKey);
      }
docs: Loads an object with the hash and range key.
  @param hashKey The hash key value.
  @param rangeKey The range key value.
  @return The object.
  @see com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper#load