“没有光纤运行”，同时尝试逐行解析csv

I'm trying to understand how I can use a Fiber within fast-csv to make a line-by-line reader (single user command line script) that pauses reading/processing at each line until that line has completed a variety of async calls. (without rolling my own csv code, I want to use something that has already figured out the gotchas with respect to csv formatting)I'm trying to understand how I can use a Fiber