@Override
                public void write(IApimanBuffer chunk) {
                    byte[] bytes = chunk.getBytes();
                    readBuffer.append(bytes);
                }
@see io.apiman.gateway.engine.policy.IDataPolicy#getResponseDataHandler(io.apiman.gateway.engine.beans.ApiResponse, io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object)
plugins/transformation-policy/src/main/java/io/apiman/plugins/transformation_policy/TransformationPolicy.java