CLASS at net/minecraft/command/ICommandManager
METHOD a getUsableCommands (Lau;)Ljava/util/List;
METHOD a executeCommand (Lau;Ljava/lang/String;)I
METHOD a getTabCompletionList (Lau;Ljava/lang/String;Ldx;)Ljava/util/List;
METHOD b getRegisteredCommands ()Ljava/util/Map;