(function process(messages) {
 // Add your code here to consume kafka messages 
 // sample message [ { 'key' : 'message_key' , 'message' : 'message' , 'headers' : [ { 'key' : 'header_key' , 'value' : 'header_value' } ] } ] 

 for (var i = 0; i < messages.length; i++) {
     var message = JSON.parse(messages[i].message);
     gs.info('Number ' + message.number + ', short description ' + message.short_description +
         ', headers ' + JSON.stringify(messages[i].headers));
 }
})(messages);