Method checkGroup

/**
 * Method to check if a group is authorised to perform an action, optionally on an asset.
 *
 * @param   integer         $groupId   The path to the group for which to check authorisation.
 * @param   string          $action    The name of the action to authorise.
 * @param   integer|string  $assetKey  The asset key (asset id or asset name). null fallback to root asset.
 * @param   boolean         $preload   Indicates whether preloading should be used.
 *
 * @return  boolean  True if authorised.
 *
 * @since   1.7.0
 */
public static function checkGroup($groupId, $action, $assetKey = null, $preload = true)
{
    // Sanitize input.
    $groupId = (int) $groupId;
    $action = strtolower(preg_replace('#[\\s\\-]+#', '.', trim($action)));
    return self::getAssetRules($assetKey, true, true, $preload)->allow($action, self::getGroupPath($groupId));
}