unwrap is also kind of neat in that it 'unwraps' the value, so something that converts strings to ints

  intval = convert("42").unwrap()

is like

  if intval, err := convert("42"); err != nil { panic(err) }

but you can not do

  intval = convert("42")

and pretend it can't fail, but in go you can do

  intval, _ := convert("42")

the rust unwrap would most similar to a

intval := mustConvert("42")

in go, but 'must' type functions don't exist for every method in every library.