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 <https://s.apache.org/beam-runner-api-combine-model>* *One part I'm curious for community feedback on is the idea of disabling Combiner lifting for Combines with side inputs. I mention it here <https://docs.google.com/document/d/1-3mEs3Y7bIkJ0hmQ6SiHpVIFu5vbY6Zcpw-7tOMVg4U/edit#bookmark=id.ur8f96unbqx8>. Please let me know if you have objections to that idea.* *Thank you,* *Daniel Oliveira*
