MetaDataHandler 3.1.15 API

```
public interface BaseChannel.MetaDataHandler

                    
```
MetaData handler. This provides callback for all meta data related methods.Refer to createMetaData.

Method Summary

Modifier and Type	Method	Description
`abstract void`	`onResult(Map<String, String> metaDataMap, SendBirdException e)`	A callback for when meta data is created, updated or read.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - onResult
```
 abstract void onResult(Map<String, String> metaDataMap, SendBirdException e)
```
    A callback for when meta data is created, updated or read.
    
    Parameters:
    
    metaDataMap - Meta data key-value map for result.
    
    e - null if no error.