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package convert import (	"strings"	"testing") func TestStringSliceWithConverter(t *testing.T) {	s := StringSliceWithConverter([]string{"A", "b", "C"}, strings.ToLower)	e := []string{"a", "b", "c"}	if s[0] != e[0] || s[1] != e[1] || s[2] != e[2] {		t.Errorf("%v != %v", s, e)	}}