You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: example_test.go
    path of file: ./repos/go-starter-kit/vendor/golang.org/x/text/currency
    
    the code of the file until where you have to start completion: // Copyright 2016 The 
    
func ExampleQuery() {
	t1799, _ := time.Parse("2006-01-02", "1799-01-01")
	for it := currency.Query(currency.Date(t1799)); it.Next(); {
		from := ""
		if t, ok := it.From(); ok {
			from = t.Format("2006-01-01")
		}
		fmt.Printf("%v is used in %v since: %v\n", it.Unit(), it.Region(), from)
	}
	// Output:
	// GBP is used in GB since: 1694-07-07
	// GIP is used in GI since: 1713-01-01
	// USD is used in US since: 1792-01-01
}