Pure aggregation of per-LOD LoaderMetrics into a single snapshot.
The progressive (multi-additive-LOD) loaders wrap N inner spatial-index
loaders. To report honest telemetry to the data-loading monitor they expose
the LoaderMonitor surface and roll their inner loaders' metrics up
through this helper. Kept pure (no this, no side effects) so it can be
unit-tested in isolation and reused across the Points / Lines / GSplats
progressive loaders.
Pure aggregation of per-LOD LoaderMetrics into a single snapshot.
The progressive (multi-additive-LOD) loaders wrap N inner spatial-index loaders. To report honest telemetry to the data-loading monitor they expose the LoaderMonitor surface and roll their inner loaders' metrics up through this helper. Kept pure (no
this, no side effects) so it can be unit-tested in isolation and reused across the Points / Lines / GSplats progressive loaders.