protected function isExpired()
    {
        $exp = \DateTime::createFromFormat( 'U', $this->getClaimOrNull( self::EXPIRY ) );
        return !$exp || $exp <= ( new DateTime );
    }
protected function isExpired()
    {
        $exp = \DateTime::createFromFormat( 'U', $this->getClaimOrNull( self::EXPIRY ) );
        return !$exp || $exp <= ( new DateTime );
    }
protected function isExpired ( ) { $ exp = \ DateTime :: createFromFormat ( 'U' , $ this -> getClaimOrNull ( self :: EXPIRY ) ) ; return ! $ exp || $ exp <= ( new DateTime ) ; }
Is this token expired
@return bool
Is this token expired