public static List<HttpMessageConverter<?>> installMessageConverters(List<HttpMessageConverter<?>> messageConverters) {
		messageConverters.add(new AllEncompassingFormHttpMessageConverter());
		if (jackson2Present) {
			messageConverters.add(new MappingJackson2HttpMessageConverter());
		}
		return messageConverters;
	}
Install message converters we're interested in, with json coming before xml.
spring-xd-rest-domain/src/main/java/org/springframework/xd/rest/domain/support/RestTemplateMessageConverterUtil.java