Removing Trap Listener

[irfancnk]

I am using following for my NodeJS server,

const snmpTrap = require('snmpjs');
var log = new bunyan({ name: 'snmpd', level: 'trace'});
var trapd = snmpTrap.createTrapListener({log: log});
trapd.bind(options);
trapd.on('trap',function(msg) {
    handleTrap(msg);
});

However, when I try graceful shutdown the Node server, I got the port 162 INUSE error, which is because of the absence of removeListener method. So is there a way to gracefully shutdown the snmpTrap listener?