Module Any = Async_extra.Import.Rpc_kernel.Any

| Rpc : ('q, 'r) Rpc_kernel.Rpc.t -> t

| Pipe : ('q, 'r, 'e) Rpc_kernel.Pipe_rpc.t -> t

| State : ('q, 's, 'u, 'e) Rpc_kernel.State_rpc.t -> t

| One_way : 'm Rpc_kernel.One_way.t -> t