size Bytes Of
Per-content size by data type: walks the right IDB object store via the same impls the public stores expose, so the result matches what the per-store TileStore.sizeBytes / FeatureStore.sizeBytes would report.
Per-content size by data type: walks the right IDB object store via the same impls the public stores expose, so the result matches what the per-store TileStore.sizeBytes / FeatureStore.sizeBytes would report.