Add some comments to libs/operator.php
Add some comments to libs/operator.php

Mibew/tray,Mibew/tray,Mibew/java,Mibew/java,Mibew/java,Mibew/java,Mibew/tray,Mibew/java,Mibew/tray,Mibew/tray,Mibew/java,Mibew/tray