pathParams property
REST path parameter values in template order; empty for RPC.
If the server's router is mounted under a path with parameters
(Router::nest("/t/{tenant}", ..)), the mount's values come first,
then the route's own, as in the Rust client
(cratestack-client-rust's envelope binding): the binding is the list
the server's router matched, in order.
Implementation
final List<String> pathParams;