add_action( 'wp_head', array( &$this, 'addMetaData' ) );

function removeAddMetaData() {
    $vc = new Vc_Base();
    remove_action('wp_head', array(&$vc, 'addMetaData'),10000);
}
add_action('init', 'removeAddMetaData', 10000);

function removeAddMetaData() {
    remove_action('wp_head', array(visual_composer(), 'addMetaData'));
}
add_action('init', 'removeAddMetaData');

return vc_manager()->vc();

$vc = new Vc_Base();
$this->factory['vc'] = $vc;
return $this->factory['vc'];