This issue describes things to change for the 1.19 port, as I have pending breaking changes. Will be updating this periodically as I remember more things.

• Cleanup methods on SimpleBlockModel, then have ColoredBlockModel extend it. Will make it easier to support in all custom models
• Fully migrate JSON predicates from Tinkers' Construct
• Clean up model data usage, getModelData is intended to return a new instance instead of a cached instance as forge will cache it for me. refreshModelData will alert forge to call getModelData again to get the new instance
• Rename keys on fluid ingredient for consistency with outputs/item ingredients (see #203)

Changes that would be good

• Migrate multi-module UIs to widgets