1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Magento\Variable\Model\Config\StructureVirtual Magento\Variable\Model\Config\Structure\Dom variable_system_configuration_structure Magento\Variable\Model\Config\Structure\ReaderVirtual Magento\Variable\Model\Config\StructureDataVirtual