On the Your libraries page, select the 
Used
 checkbox for the library you want to define as available and then save your changes.
To define a system library as available, complete the following:
Click the 
System libraries
 tab.
The System libraries page appears, displaying the JavaScript libraries for your API.
The first several libraries that are listed are selected and available by default. You cannot clear the 
Used
 checkbox for these libraries.
Select the 
Used
 checkbox for the library you want to define as available and then save your changes.

On the Your Libraries page, click 
Edit 
for the library you want to export.
The code editor expands to reveal more options.
Click 
Export Code
.
Save your changes.

With your API open, in the Create section, click 
API Properties
.
The Details tab displays by default.
Click the 
Libraries
 tab.
The Your libraries page appears by default.
Click 
Change
 for the library that you have updated.The Logic library dialog opens.
In the Code field, click 
Choose File
, select the updated JavaScript file, and then save your changes.

var salesRep = row.EmployeeID; // object model (row) provides accessors to related objects
if (salesRep !== null) {
  var mail = B2B.sendEmail(); // this is a loadable library
  var config = {
    to: '[email protected]', // better, find this from DB
    from: '[email protected]acme.com',
    title: 'Congratulations on your new Order',
    text: 'An order was placed for you, totaling ' + row.AmountTotal
  };
  mail.configure(config);
  var msg = mail.send();
  logicContext.logDebug('Sending Mail - msg: ' + msg);
}

var orderDate = currentBean.order_date.getTime();
var shippingDate = currentBean.shipping_date.getTime();
currentBean.processing_delay = moment(orderData).from(shippingData, true);

public class MyClass {
  public static int add(int a, int b) {
    return a+b;
  }
}

var MyClassObject = Java.type("MyClass");
var myResult = MyClassObject.add(1,2);