code: public RestTemplateBuilder messageConverters(
  			HttpMessageConverter<?>... messageConverters) {
  		Assert.notNull(messageConverters, "MessageConverters must not be null");
  		return messageConverters(Arrays.asList(messageConverters));
  	}
docs: Set the {@link HttpMessageConverter HttpMessageConverters} that should be used with
  the {@link RestTemplate}. Setting this value will replace any previously configured
  converters and any converters configured on the builder will replace RestTemplate's
  default converters.
  @param messageConverters the converters to set
  @return a new builder instance
  @see #additionalMessageConverters(HttpMessageConverter...)