Re: Design specs for portable Combine

So since I made some updates to the doc I feel like this is a good time to add a summary (I didn't know I needed to do that when I originally sent it out). Structure and Lifting of Combines (In Apache Beam Portability) This doc covers how Combines will be modeled in the Runner API and Fn API, as w

Design specs for portable Combine

Hi everyone, I'm going to be working on getting Combines working with portable pipelines, and I've written up a design for how to model them. If anyone's interested in portability please check it out and provide any feedback you may have. *https://s.apache.org/beam-runner-api-combine-model