| Name | Description | Type | Use |
|---|---|---|---|
| successCallback | A callback that is called with the time of the last modification. See the "Returns"
section below for the getMetadata method's behavior, If the
callback is not provided. |
MetadataCallback |
required |
| errorCallback | A callback that is called when errors happen. | ErrorCallback |
optional |
If the successCallback is provided, the method does not return
anything. If the callback is not provided, the function synchronously returns the
Metadata object snapshot from the time when this entry was created (it is not
refreshed).