index.ts

export class ChatGptConversationService {
  /* ... */ 
	deleteConversation = (id: string) => {
		if (id in ConversationStorage) {
			delete ConversationStorage[id];
			return Promise.resolve(true);
		}
		return Promise.resolve(false);
	};
  /* ... */
}


export class InMemoryConversationService implements ConversationService {
  /* ... */
  return this.chatgpt.deleteConversation(id);
  /* ... */
}