Method finaliseUninstall

/**
 * Method to finalise the uninstallation processing
 *
 * @return  boolean
 *
 * @since   4.0.0
 * @throws  \RuntimeException
 */
protected function finaliseUninstall() : bool
{
    $extensionId = $this->extension->extension_id;
    $db = $this->parent->getDbo();
    $retval = true;
    // Remove the schema version
    $query = $db->getQuery(true)->delete('#__schemas')->where('extension_id = :extension_id')->bind(':extension_id', $extensionId, ParameterType::INTEGER);
    $db->setQuery($query);
    $db->execute();
    $element = $this->extension->element;
    $clientId = $this->extension->client_id;
    // Let's delete all the module copies for the type we are uninstalling
    $query->clear()->select($db->quoteName('id'))->from($db->quoteName('#__modules'))->where($db->quoteName('module') . ' = :element')->where($db->quoteName('client_id') . ' = :client_id')->bind(':element', $element)->bind(':client_id', $clientId, ParameterType::INTEGER);
    $db->setQuery($query);
    try {
        $modules = $db->loadColumn();
    } catch (\RuntimeException $e) {
        $modules = [];
    }
    // Do we have any module copies?
    if (\count($modules)) {
        // Ensure the list is sane
        $modules = ArrayHelper::toInteger($modules);
        $modID = implode(',', $modules);
        // Wipe out any items assigned to menus
        $query = $db->getQuery(true)->delete($db->quoteName('#__modules_menu'))->where($db->quoteName('moduleid') . ' IN (' . $modID . ')');
        $db->setQuery($query);
        try {
            $db->execute();
        } catch (\RuntimeException $e) {
            Log::add(Text::sprintf('JLIB_INSTALLER_ERROR_MOD_UNINSTALL_EXCEPTION', $e->getMessage()), Log::WARNING, 'jerror');
            $retval = false;
        }
        // Wipe out any instances in the modules table
        /** @var \Joomla\CMS\Table\Module $module */
        $module = Table::getInstance('Module');
        foreach ($modules as $modInstanceId) {
            $module->load($modInstanceId);
            if (!$module->delete()) {
                Log::add(Text::sprintf('JLIB_INSTALLER_ERROR_MOD_UNINSTALL_EXCEPTION', $module->getError()), Log::WARNING, 'jerror');
                $retval = false;
            }
        }
    }
    // Now we will no longer need the module object, so let's delete it and free up memory
    $this->extension->delete($this->extension->extension_id);
    $query = $db->getQuery(true)->delete($db->quoteName('#__modules'))->where($db->quoteName('module') . ' = :element')->where($db->quoteName('client_id') . ' = :client_id')->bind(':element', $element)->bind(':client_id', $clientId, ParameterType::INTEGER);
    $db->setQuery($query);
    try {
        // Clean up any other ones that might exist as well
        $db->execute();
    } catch (\RuntimeException $e) {
        // Ignore the error...
    }
    // Remove the installation folder
    if (!Folder::delete($this->parent->getPath('extension_root'))) {
        // Folder should raise an error
        $retval = false;
    }
    return $retval;
}