How to use the react-native-im-easemob.ChatManager.getConversation function in react-native-im-easemob

Delegate.im.conversation.loadItem = (imId, chatType, autoCreate) => {
        return ChatManager.getConversation(imId, chatType, autoCreate)
            .then((result) => {
                return {
                    ...result,
                    imId: result.conversationId,
                    chatType: result.type,
                };
            });
    };
    Delegate.im.conversation.deleteOne = (imId) => {