Add Custom Javascript to method-renderer File

I have created a custom payment module, and when I click the Place Order button, I need it to run a set of custom javascript functions. To do this, how do I include a custom function from another javascript file into the /view/frontend/web/js/view/payment/ javascript file?

Submit Button:

<button
  data-role="review-save"
  type="submit"
  data-bind="
    attr: {title: $t('Place Order')},
    enable: (getCode() == isChecked()),
    click: processPayment, <--custom method-renderer function
    css: {disabled: !isPlaceOrderActionAllowed()}
  "
  class="action primary checkout"
  disabled
>
  <span data-bind="i18n: 'Place Order'"></span>
</button>

method-renderer function

define([
        'jquery',
        'Magento_Payment/js/view/payment/cc-form',
    ],
    function ($, Component) {
        'use strict';

        return Component.extend({
            defaults: {
                template: '<Module>/payment/<File>'
            },
            context: function() {
                return this;
            },
            getCode: function() {
                return '<Code>';
            },
            isActive: function() {
                return true;
            },
            processPayment() {
                authorizePayment(); <-- Custom Javascript Function
            }
        });
    }
);