OptionalextensionThe key of the file. Must be unique within the Loader.
OptionalmappingIf this plugin is to be injected into the Scene, this is the property key used.
OptionalstartAutomatically start the plugin after loading?
OptionalurlThe absolute or relative URL to load the file from.
OptionalxhrExtra XHR Settings specifically for this file.
The default file extension to use if no url is provided.