Named AssetLoader table for §81's "asset formats" point.
Map preserves insertion order, which is the order names reports (§33).
Map
Registered names, in insertion order.
Number of registered loaders.
The loader for name, or undefined.
name
undefined
Whether name has a loader.
Registers loader under name. Returns this so registrations chain.
loader
this
FourError INVALID_APPLICATION_STATE if name is empty, or if a different loader already occupies that name.
INVALID_APPLICATION_STATE
Named AssetLoader table for §81's "asset formats" point.
Mappreserves insertion order, which is the order names reports (§33).