abstract fun registerCommands(commands: MutableList<Command>): CommandRegistry
Like #registerCommands(List, Handler), without a completion handler.
abstract fun registerCommands(commands: MutableList<Command>, completionHandler: Handler<AsyncResult<MutableList<Command>>>): CommandRegistry
Register a list of commands.
commands - the commands to register
completionHandler - notified when the command is registered
Return
a reference to this, so the API can be used fluently