问题
The question is related to my previous question: Why can't I use context.read in build(), but I can use Provider.of with listen: false?
You said that an old Provider.of<X>(context, listen: false) syntax is unsafe. However, it works.
I believe fetchTransactions() method won't change, so there's no need to watch it.
I can't use context.read because it's not in the closure and will throw the "don't use context.read in a build method" error.
I can't use context.watch or context.select with FutureBuilder, because it will cause an infinite rebuild loop.
来源：https://stackoverflow.com/questions/62539885/flutter-provider-what-is-the-best-way-to-dispatch-the-action-properly