phaser/src/gameobjects/graphics/GraphicsFactory.js

var Graphics = require('./Graphics');
var GameObjectFactory = require('../GameObjectFactory');

/**
 * Creates a new Graphics Game Object and adds it to the Scene.
 *
 * Note: This method will only be available if the Graphics Game Object has been built into Phaser.
 *
 * @method Phaser.GameObjects.GameObjectFactory#graphics
 * @since 3.0.0
 *
 * @param {object} config - [description]
 * 
 * @return {Phaser.GameObjects.Graphics} The Game Object that was created.
 */
GameObjectFactory.register('graphics', function (config)
{
    return this.displayList.add(new Graphics(this.scene, config));
});

//  When registering a factory function 'this' refers to the GameObjectFactory context.
//  
//  There are several properties available to use:
//  
//  this.scene - a reference to the Scene that owns the GameObjectFactory
//  this.displayList - a reference to the Display List the Scene owns
//  this.updateList - a reference to the Update List the Scene owns