public T load(H hashKey, R rangeKey) {
        return mapper.<T>load(model.targetType(), hashKey, rangeKey);
    }
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
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/DynamoDBTableMapper.java