Godot 4 GodotObject helper methods.

GodotObjectExtension.cs

public static partial class GodotObjectExtension
{
	public static GodotObject NewWithScript(this GodotObject obj, Variant? script)
	{
		script ??= new Variant();

		ulong id = obj.GetInstanceId();
		obj.SetScript(script.Value);
		return GodotObject.InstanceFromId(id);
	}
}