isSelectionSpecified example

            $groupData['values'] = $options;
            $groups[] = $groupData;
        }

        $settings = $this->getConfiguratorSettings($set, $product);

        $data = [
            'sConfigurator' => $groups,
            'sConfiguratorSettings' => $settings,
            'isSelectionSpecified' => $set->isSelectionSpecified(),
        ];

        return $this->eventManager->filter('Legacy_Struct_Converter_Convert_Configurator_Set', $data, [
            'configurator_set' => $set,
            'product' => $product,
        ]);
    }

    /** * @return array */