// struct field given the struct type and the JSON name of the field.
// It returns field type, a slice of patch strategies, merge key and error.
// TODO: fix the returned errors to be introspectable.
func LookupPatchMetadataForStruct(t reflect.Type, jsonField string) (
	elemType reflect.Type, patchStrategies []string, patchMergeKey string, e error) {
	if t.Kind() == reflect.Pointer {
		t = t.Elem()
	}

	if t.Kind() != reflect.Struct {