ReadonlyinstancedNumber of occurrences routed into the instanced shard this batch. The viewer folds this into its total mesh count so the count reflects ALL rendered geometry (flat + instanced), not just the flat MeshCollection.
The flat MeshCollection (transparent glass + type-product geometry). Moves out — call once.
The instanced IFNS shard bytes (opaque ordinary occurrences). Moves out.
Result of [
IfcAPI::process_geometry_batch_partitioned]: the flat MeshCollection (transparent + type geometry) and the instanced IFNS shard (opaque ordinary occurrences) from ONE produce_batch. Take-once accessors so the JS side moves each out without a clone.