writeHeldItemSidecar
public static void writeHeldItemSidecar(File freeMinecraftModelsAssets, String itemId, FileModelConverter converter)
Describes a held item's particles for ResourcePackManager, which adds them to the item's Bedrock attachable: effect identifiers, locators in Java item model pixels and the looping particle timeline. Written beside the Java pack's item models, not into the Bedrock bundle.