public <T extends BaseResult> HttpResponseHandler<T> createResponseHandler(
            JsonOperationMetadata operationMetadata,
            Unmarshaller<T, JsonUnmarshallerContext> responseUnmarshaller) {
        final JsonResponseHandler<T> responseHandler = JSON_FACTORY
                .createResponseHandler(operationMetadata, responseUnmarshaller);
        return new ApiGatewayResponseHandler<>(responseHandler);
    }
Creates a response handler to be used for handling a successful response.

@param operationMetadata Additional context information about an operation to create the appropriate response handler.
aws-java-sdk-opensdk/src/main/java/com/amazonaws/opensdk/protect/protocol/ApiGatewayProtocolFactoryImpl.java