Function callback

packages/socket.io-adapter/lib/cluster-adapter.ts:316–330

(arg: any)

        }
        let called = false;
        const callback = (arg: any) => {
          class="cm">// only one argument is expected
          if (called) {
            return;
          }
          called = true;
          debug(class="st">"[%s] calling acknowledgement with %j", this.uid, arg);
          this.publishResponse(message.uid, {
            type: MessageType.SERVER_SIDE_EMIT_RESPONSE,
            data: {
              requestId: message.data.requestId,
              packet: arg,
            },
          });
        };

        this.nsp._onServerSideEmit([...packet, callback]);
        break;