aMember (site.php): Hide sidebar for some products in shopping cart catalogue

site.php

<?php

Am_Di::getInstance()->productTable->customFields()
    ->add(new Am_CustomFieldSingle_Checkbox('remove_sidebar', 'Remove Sidebar?'));

Am_Di::getInstance()->front->registerPlugin(new class extends Zend_Controller_Plugin_Abstract {
    public function preDispatch(Zend_Controller_Request_Abstract $request)
    {
     	if ($request->getModuleName() == 'cart'
            && $request->getControllerName() == 'index'
            && $request->getActionName() == 'product') {

            $product = $request->getParam('path') ?
                Am_Di::getInstance()->productTable->findFirstByPath($request->getParam('path')) :
                Am_Di::getInstance()->productTable->load($request->getParam('id'));

            if ($product->data()->get('remove_sidebar')) {
                $bm = Am_Di::getInstance()->blocks;
                foreach ($bm->get('cart/right') as $block) {
                    $bm->remove($block->getId());
                }
            }
        }
    }
});