private <T> T createWithoutSpring(Class<T> extensionClass) {
		try {
			return extensionClass.newInstance();
		} catch (Exception e) {
			LOGGER.error(e.getMessage(), e);
		}

		return null;
	}
SpringExtensionFactory extended class.
The springframework ApplicationContext injection.

@author Gisoo Gwon ,GeunWoo Son
@since 3.0
ngrinder-controller/src/main/java/org/ngrinder/infra/plugin/extension/NGrinderSpringExtensionFactory.java