Updating code for version 0.20 - channel_display_groups

[NoaMills-USDA]

I have code for a semantic segmentation model that worked in version 0.13. I'm trying to create a new version of the same code that's compatible with rastervision 0.20. When I first ran my original (0.13) code in version 0.20, I ran into an error stating that the field "default_class_id" is not permitted in GeoJSONVectorSourceConfig. Through the documentation and the new quickstart code, I was able to figure out how to fix this by passing the "transformers" list. instead of the "default_class_id". That is the only change I have made so far, and the rest of my code is written for version 0.13. I tried running it again and ran into a similar error: the "channel_display_groups" field is not permitted in SemanticSegmentationGeoDataConfig. I have two questions:

1. How do I specify the channel_display_groups information for SemanticSegmentationGeoDataConfig in version 0.20?
2. Is there a more systematic way for me to update my code to version 0.20 other than running my previous code and tackling bugs when they come up?

[AdeelH]

Apologies for the late response.

1. channel_display_groups is now supposed to go in plot_options as shown here.
2. We do not have such a checklist yet. But it would definitely be nice to have. One thing you can do is to take a look at the diff between the two branches. Go to the "Files Changed" tab, scroll down to the example files (isprs_potsdam.py etc.), and see what's changed. Here is a non-exhaustive list of required changes: v0.13 to v0.20 migration guide #1666.