GetScenePlugins = function (sys)
{
    var defaultPlugins = sys.plugins.getDefaultScenePlugins();

    var scenePlugins = GetFastValue(sys.settings, 'plugins', false);

    //  Scene Plugins always override Default Plugins
    if (Array.isArray(scenePlugins))
    {
        return scenePlugins;
    }
    else if (defaultPlugins)
    {
        return defaultPlugins;
    }
    else
    {
        //  No default plugins or plugins in this scene
        return [];
    }
}
Builds an array of which plugins (not including physics plugins) should be activated for the given Scene.

@function Phaser.Scenes.GetScenePlugins
@since 3.0.0

@param {Phaser.Scenes.Systems} sys - The Scene Systems object to check for plugins.

@return {array} An array of all plugins which should be activated, either the default ones or the ones configured in the Scene Systems object.