error[E0308]: mismatched types
   --> src/rust/engine/process_execution/bazel_protos/src/remote_execution_grpc.rs:224:84
    |
224 |         self.client.unary_call_async(&METHOD_CONTENT_ADDRESSABLE_STORAGE_GET_TREE, req, opt)
    |                                                                                    ^^^ expected struct `remote_execution::GetTreeRequest`, found reference
    |
    = note: expected type `remote_execution::GetTreeRequest`
               found type `&remote_execution::GetTreeRequest`