How to use eventemitter3

Comprehensive eventemitter3 code examples:

How to use eventemitter3.default:

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 */
Formio.namespace = '';
/**
 * Handles events fired within this SDK library.
 */
Formio.events = new eventemitter3_1.default();
/**
 * Stores all of the libraries lazy loaded with ```Formio.requireLibrary``` method.
 */
Formio.libraries = {};

How to use eventemitter3.call:

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initialize:

function World (scene, config)
{
    EventEmitter.call(this);

    /**
     * The Scene this simulation belongs to.
     *