Creates an expression for the given parameter type if the parameter can be mapped
automatically or null if the parameter cannot be mapped due to unsufficient
annotations or not fitting with the default type conventions.
A helper method to indicate that the message exchange is complete
which will set the status to ExchangeStatus.DONE and send the message
on the delivery channel.
An ExchangeTarget may be used to specify the target of an exchange,
while retaining all the JBI features (interface based routing, service
name based routing or endpoint routing).