old_contents: import Response from './responses/Response';
  import VoiceResponse from './responses/VoiceResponse';
  
  export {
    Response,
    VoiceResponse,
  };
  
new_contents: import ArbitraryVoiceResponse from './responses/ArbitraryVoiceResponse';
  import BroadcastVoiceResponse from './responses/BroadcastVoiceResponse';
  import ConvertedVoiceResponse from './responses/ConvertedVoiceResponse';
  import FileVoiceResponse from './responses/FileVoiceResponse';
  import OpusVoiceResponse from './responses/OpusVoiceResponse';
  import StreamVoiceResponse from './responses/StreamVoiceResponse';
  import Response from './responses/Response';
  import VoiceResponse from './responses/VoiceResponse';
  
  export {
    ArbitraryVoiceResponse,
    BroadcastVoiceResponse,
    ConvertedVoiceResponse,
    FileVoiceResponse,
    OpusVoiceResponse,
    StreamVoiceResponse,
    Response,
    VoiceResponse,
  };
  
subject: Add exports.