builder.addPropertyValue("fileSystem", SpringUtil.parseSpringChildElement(childElm, parserContext, builder));
} else if("commands".equals(childName)) {
Object commandFactory = parserContext.getDelegate().parseCustomElement(childElm, builder.getBeanDefinition());
builder.addPropertyValue("commandFactory", commandFactory);
} else if("messages".equals(childName)) {
MessageResource mr = parseMessageResource(childElm, parserContext, builder);
builder.addPropertyValue("messageResource", mr);
} else {
throw new FtpServerConfigurationException("Unknown configuration name: " + childName);
}