public function renderRuleGroup($tpl = null) { if (!isset($this->context)) { $this->context = JeproshopContext::getContext(); } $taxRuleGroupModel = new JeproshopTaxRulesGroupModelTaxRulesGroup(); $taxRuleGroups = $taxRuleGroupModel->getTaxRulesGroupsList(); $this->assignRef('tax_rules_groups', $taxRuleGroups); $this->helper = new JeproshopHelper(); $this->addToolBar(); $this->sideBar = JHtmlSidebar::render(); parent::display($tpl); }