extension/ezjscore/autoloads/ezjscpackertemplatefunctions.php
static public function getPersistentVariable( $key = null )
    {
        if ( $key !== null )
        {
            if ( isset( self::$persistentVariable[ $key ] ) )
                return self::$persistentVariable[ $key ];
            return null;
        }
        return self::$persistentVariable;
    }
static public function getPersistentVariable( $key = null )
    {
        if ( $key !== null )
        {
            if ( isset( self::$persistentVariable[ $key ] ) )
                return self::$persistentVariable[ $key ];
            return null;
        }
        return self::$persistentVariable;
    }
static public function getPersistentVariable ( $ key = null ) { if ( $ key !== null ) { if ( isset ( self :: $ persistentVariable [ $ key ] ) ) return self :: $ persistentVariable [ $ key ] ; return null ; } return self :: $ persistentVariable ; }
Reusable function for getting internal persistent_variable

@internal
@param string $key Optional, return all values if null
@return array|string
Reusable function for getting internal persistent_variable