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type A struct {
One string
Metadata map[string]string
type B struct {
One *string
Meta map[string]string `mapstructure:"metadata"`
func main() {
a := A{One: "foo", Metadata: map[string]string{"a": "b"}}
var b B
if err := mapstructure.Decode(a, &b); err != nil {
// b = B{One: &"foo", Meta: map[string]string{"a": "b"}}
// (Note: ^ I know the above is not valid Go syntax, but it gets
// the point across)
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