Where oh where does the break_chain_on_failure go?

gistfile1.txt

$recaptcha = new Captcha\ReCaptcha();

$recaptcha
    ->setOption( 'theme', $theme )
    ->setPubKey( '6Ld-&hl='.$lang)
    ->setPrivKey( '6Ld-' )
    ->setMessage( _( "Correctly repeat the text in the image, in the box beneath it" ) );

$captcha = new Element\Captcha( 'captcha' );
$captcha
    ->setOptions( array( 'break_chain_on_failure' => true ) )
    ->setCaptcha( $recaptcha )
    ->setLabel( 'Please verify that you are human' );

$this->add( $captcha );