setExtends example

$this->_allowModifications = (bool) $options['allowModifications'];
        }
        if (isset($options['adapter']) && $options['adapter'] instanceof Enlight_Config_Adapter) {
            $this->_adapter = $options['adapter'];
        } else {
            $this->_adapter = self::$_defaultAdapter;
        }
        if (isset($options['section'])) {
            $this->setSection($options['section']);
        }
        if (isset($options['extends'])) {
            $this->setExtends($options['extends']);
        }
        if (\is_array($config)) {
            $this->setData($config);
        } elseif ($config !== null) {
            $this->setName($config);
        } else {
            throw new Enlight_Config_Exception('Please specify configuration data');
        }
    }

    /** * Supports isset() overloading on PHP 5.1 * * @param string $name * * @return bool */