@MessagingGateway and values from properties

Could be useful to set up a defaultReplyTimeout and other props for a @MessagingGateway using properties place holder.

@MessagingGateway(
    name = "name", 
    defaultRequestChannel = "channel", 
    errorChannel = "channel", defaultReplyTimeout="${myValue}" )

defaultReplyTimeout="${myValue}"

is not valid because it is waiting a long value but maybe exists an alternative.

Thanks