如何在Golang中发出2个并发网络请求

I have two functions that make networks requests:

e.g.:

func request1() (resultTypeA, error) {
  ....
}

func request2() (requestTypeB, error) {
  ...
}

Given that they are two different types, I can't just use one channel. What is the best pattern to parallelize to calls:

resultA, err := request1()
resultB, err := request2()