Configure a {@link MessageHeaderInitializer} to pass on to {@link HandlerMethodReturnValueHandler HandlerMethodReturnValueHandlers} that send messages from controller return values. <p>By default, this property is not set.
See Implementation
Configure a {@link MessageHeaderInitializer} to pass on to {@link HandlerMethodReturnValueHandler HandlerMethodReturnValueHandlers} that send messages from controller return values. <p>By default, this property is not set.