Static method called when a LoaderPlugin is created.
Loops through the local types object and injects all of them as properties into the LoaderPlugin instance.
The LoaderPlugin to install the types into.
Static method called directly by the File Types.
The key is a reference to the function used to load the files via the Loader, i.e.
The key that will be used as the method name in the LoaderPlugin.
The function that will be called when LoaderPlugin.key is invoked.