code: public WebServiceTemplateBuilder setMarshaller(Marshaller marshaller) {
  		return new WebServiceTemplateBuilder(this.detectHttpMessageSender,
  				this.interceptors, this.internalCustomizers, this.customizers,
  				this.messageSenders, marshaller, this.unmarshaller,
  				this.destinationProvider, this.transformerFactoryClass,
  				this.messageFactory);
  	}
docs: Set the {@link Marshaller} to use to serialize messages.
  @param marshaller the message marshaller
  @return a new builder instance.
  @see WebServiceTemplate#setMarshaller(Marshaller)