async isOpen() {
        return (
            (await $(this.rootElement).isExisting()) &&
            (await $(this.rootElement)
                .$('section[role="dialog"]')
                .isDisplayed()) &&
            (await $(this.rootElement)
                .$('[id="drawer-close-button"]')
                .isDisplayed())
        );
    }
Returns true when the drawer is open, false otherwise.
@method
@returns {bool}