Function middleware

packages/rpc/src/Rpc.ts:573–583

(this: AnyWithProps, middleware: RpcMiddleware.TagClassAny)

    })
  },
  middleware(this: AnyWithProps, middleware: RpcMiddleware.TagClassAny) {
    return makeProto({
      _tag: this._tag,
      payloadSchema: this.payloadSchema,
      successSchema: this.successSchema,
      errorSchema: this.errorSchema,
      defectSchema: this.defectSchema,
      annotations: this.annotations,
      middlewares: new Set([...this.middlewares, middleware])
    })
  },
  prefix(this: AnyWithProps, prefix: string) {
    return makeProto({
      _tag: `${prefix}${this._tag}`,