error: unused `RequestDispatch` that must be used
  --> tests/compile_fail/must_use_request_dispatch.rs:13:9
   |
13 |         WorldClient::<HelloService>::rpc_client((client::Config::default(), client_transport).into()).dispatch;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: the lint level is defined here
  --> tests/compile_fail/must_use_request_dispatch.rs:11:12
   |
11 |     #[deny(unused_must_use)]
   |            ^^^^^^^^^^^^^^^
help: use `let _ = ...` to ignore the resulting value
   |
13 |         let _ = WorldClient::<HelloService>::rpc_client((client::Config::default(), client_transport).into()).dispatch;
   |         +++++++