This is a simple library that contains a number of useful methods related to managing loans.

To add this library to your script file, do the following in the Apps Script code editor:

1. Click on the menu item "Resources > Libraries..."
2. In the "Add a Library" text box, enter the script ID 1fkCpUacOQJ369_NQrvokqJMHZ4hmOv9d2ziqeIyjmW26cXlhy87J7sC- and click the "Add" button.
3. Choose a version in the dropdown box (usually best to pick the latest version).
4. Click the "Save" button.

In the new editor:

1. Click on the plus sign next to Libraries
2. In the Script ID text box, enter the script ID 1fkCpUacOQJ369_NQrvokqJMHZ4hmOv9d2ziqeIyjmW26cXlhy87J7sC- and click the "Lookup" button.
3. Choose a version in the dropdown box (usually best to pick the latest version).
4. Specify an Identifier (this is the name that will be referenced throughout your script)