getAnimationClasses() {
        let effects = [];
        for (let key in this.settings.cssEfects) {
            if (this.settings.cssEfects.hasOwnProperty(key)) {
                let effect = this.settings.cssEfects[key];
                effects.push(`g${effect.in}`);
                effects.push(`g${effect.out}`);
            }
        }
        return effects.join(' ');
    }
Get the defined
effects as string