Method startAccordion

/**
 * Add javascript support for Bootstrap accordions and insert the accordion
 *
 * @param   string  $selector  The ID selector for the tooltip. Expects a valid ID without the #!
 * @param   array   $options   An array of options for the tooltip.
 *
 * @return  string  HTML for the accordion
 *
 * @since   3.0
 *
 * Options for the tooltip can be:
 * - parent  selector  If selector then all collapsible elements under the specified parent will be closed when this
 *                     collapsible item is shown. (similar to traditional accordion behavior)
 * - toggle  boolean   Toggles the collapsible element on invocation
 * - active  string    Sets the active slide during load
 */
public static function startAccordion($selector = 'myAccordian', $options = []) : string
{
    // Only load once
    if (isset(static::$loaded[__METHOD__][$selector])) {
        return '';
    }
    // Include Bootstrap component
    Factory::getApplication()->getDocument()->getWebAssetManager()->useScript('bootstrap.collapse');
    // Setup options object
    $opt['parent'] = isset($options['parent']) ? $options['parent'] == true ? '#' . preg_replace('/^[\\.#]/', '', $selector) : $options['parent'] : '';
    $opt['toggle'] = isset($options['toggle']) ? (bool) $options['toggle'] : !($opt['parent'] === false || isset($options['active']));
    $opt['active'] = isset($options['active']) ? (string) $options['active'] : '';
    // Initialise with the Joomla specifics
    $opt['isJoomla'] = true;
    Factory::getDocument()->addScriptOptions('bootstrap.accordion', ['#' . preg_replace('/^[\\.#]/', '', $selector) => (object) array_filter((array) $opt)]);
    static::$loaded[__METHOD__][$selector] = $opt;
    return '<div id="' . $selector . '" class="accordion" role="tablist">';
}