isVisible() {
        const { x, y } = this.rootElement.$('div[role="option"]').getLocation();
        const { width, height } = this.rootElement.$('div[role="option"]').getSize();

        return (
            this.rootElement.isDisplayedInViewport() &&
            (isPointWithinRect({ x, y }, this.containerRect) &&
                isPointWithinRect({ x: x + width, y: y + height }, this.containerRect))
        );
    }
Returns true when the PicklistOption is visible inside the menu container.
@method
@returns {bool}