Saves a specific resource type to a file. The engine can save resources when you do it from the editor, or when you use the [ResourceSaver] singleton. This is accomplished thanks to multiple [ResourceFormatSaver]s, each handling its own format and called automatically by the engine. By default, Godot saves resources as [code].tres[/code] (text-based), [code].res[/code] (binary) or another built-in format, but you can choose to create your own format by extending this class. Be sure to respect the documented return types and values. You should give it a global class name with [code]class_name[/code] for it to be registered. Like built-in ResourceFormatSavers, it will be called automatically when saving resources of its recognized type(s). You may also implement a [ResourceFormatLoader]. Returns the list of extensions available for saving the resource object, provided it is recognized (see [method recognize]). Returns whether the given resource object can be saved by this saver. Saves the given resource object to a file at the target [code]path[/code]. [code]flags[/code] is a bitmask composed with [enum ResourceSaver.SaverFlags] constants. Returns [constant @GlobalScope.OK] on success, or an [enum @GlobalScope.Error] constant in case of failure.