// FIXME: add a type to catch unsupported AbortIncompleteMultipartUpload AbortIncompleteMultipartUpload `xml:"AbortIncompleteMultipartUpload,omitempty"`
	NoncurrentVersionExpiration NoncurrentVersionExpiration `xml:"NoncurrentVersionExpiration,omitempty"`
	NoncurrentVersionTransition NoncurrentVersionTransition `xml:"NoncurrentVersionTransition,omitempty"`
}

var (

func (n NoncurrentVersionExpiration) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if n.IsNull() {
		return nil
	}
	type noncurrentVersionExpirationWrapper NoncurrentVersionExpiration
	return e.EncodeElement(noncurrentVersionExpirationWrapper(n), start)
}

// UnmarshalXML decodes NoncurrentVersionExpiration

	testcases := []struct {
		n   NoncurrentVersionExpiration
		err error
	}{
		{
			n: NoncurrentVersionExpiration{
				NoncurrentDays:          0,
				NewerNoncurrentVersions: 0,
				set:                     true,
			},
			err: errXMLNotWellFormed,
		},
		{
			n: NoncurrentVersionExpiration{
				NoncurrentDays:          90,
				NewerNoncurrentVersions: 0,

			// original rule had expiry that is no longer in the new config,
			// or rule is present but missing expiration flags
			if (!rl.Expiration.IsNull() || !rl.NoncurrentVersionExpiration.IsNull()) &&
				(!ok || (updRule.Expiration.IsNull() && updRule.NoncurrentVersionExpiration.IsNull())) {
				expiryRuleRemoved = true
			}
		}
	}

	if bucketLifecycle.HasExpiry() || expiryRuleRemoved {
		currtime := time.Now()

				Value: "minio",
			}
			lc.Rules = append(lc.Rules, Rule{
				ID:     ruleID,
				Status: "Enabled",
				Filter: Filter{
					Tag: tag,
					set: true,
				},
				NoncurrentVersionExpiration: NoncurrentVersionExpiration{
					NewerNoncurrentVersions: retainVersions[i],
					set:                     true,
				},
			})
		}
		return lc
	}

```
{
    "Rules": [
        {
            "ID": "Removing all old versions",
            "Filter": {
                "Prefix": "users-uploads/"
            },
            "NoncurrentVersionExpiration": {
                "NoncurrentDays": 365
            },
            "Status": "Enabled"
        }
    ]
}
```

This JSON rule is equivalent to the following MinIO Client command:
```