Can't specify camel REST producer target URI in FIS

Neither of the methods described for specifying the target URI of a Camel REST invocation using a camel-rest endpoint in the documentation [1] works.

This method:

restConfiguration().host("myserver:8080/foo")

works so long as there is only one route in the application using a camel-rest producer.

This method:

to("rest:get:hello/{me}?host=myserver:8080/foo");

does not work at all, because the argument of "host" is treated as an object in the registry, not a String.

[1] https://github.com/apache/camel/blob/master/camel-core/src/main/docs/rest-component.adoc