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assets/templates/.fabric-block-view-api-v2 instead of the deprecated fabric-rendering-data-attachment-v1.
RenderDataBlockEntity instead of the deprecated RenderAttachmentBlockEntity to read information about templates from the world.ThemeableBlockEntity, please implement ThemeableBlockEntity2 instead. However, the old interface has been changed to extend the new interface and forward calls from fabric-rendering-data-attachment-v1, so addons should still work.fabric-model-loading-api-v1 instead of the deprecated fabric-models-v0.
UnbakedModel for items), Template items now need an arbitrary json item model to suppress "missing model" logspam.