METHOD: echoString called via an Intermediary using WS-Routing
This method has a string return type and one string [in] parameter. The call will be routed
to the endpoint via the intermediaries specified. Intermediaries and endpoints must be SOAP 1.1 nodes with
Web Services Routing Protocol support.
Select the SOAP endpoint node to call (ultimate destination):
Select the intermediary SOAP node URLs you wish to use: