public function isEmptyAt($index)
    {
        $token = $this[$index];

        return null === $token->getId() && '' === $token->getContent();
    }
public function isEmptyAt($index)
    {
        $token = $this[$index];

        return null === $token->getId() && '' === $token->getContent();
    }
public function isEmptyAt ( $ index ) { $ token = $ this [ $ index ] ; return null === $ token -> getId ( ) && '' === $ token -> getContent ( ) ; }
@param int $index

@return bool
@param int $index