how to place ELSE on if function on multipostthumbnails? [closed]

Question

Either

if ( class_exists('MultiPostThumbnails') ) :
    MultiPostThumbnails::the_post_thumbnail(get_post_type());
else:
    //someimage
endif;

OR

if ( class_exists('MultiPostThumbnails') ) {
    MultiPostThumbnails::the_post_thumbnail(get_post_type());
} else {
    //someimage
}

In regards to your comment:

if ( class_exists('MultiPostThumbnails') ) :

    $image = MultiPostThumbnails::get_the_post_thumbnail( get_post_type(), 'secondary-image', NULL, 'proimg', array('class' => 'img-responsive imgwid') );

    if ( !empty( $image ) ) {
        echo $image;
    } else {
        echo '<p>asdasdasdasdasdas</p>';
    }
endif;