public function setNoFollow( $noFollow ) {
		$this->noFollow = is_bool( $noFollow ) ? $noFollow : true;

		if ( $this->noFollow ) {
			$this->button->setAttributes( [ 'rel' => 'nofollow' ] );
		} else {
			$this->button->removeAttributes( [ 'rel' ] );
		}

		return $this;
	}