public static interface

# DatabaseReference.CompletionListener

com.google.firebase.database.DatabaseReference.CompletionListener

## Class Overview

This interface is used as a method of being notified when an operation has been acknowledged by the Database servers and can be considered complete

## Summary

Public Methods
abstract void | onComplete(DatabaseError error, DatabaseReference ref) This method will be triggered when the operation has either succeeded or failed.

## Public Methods

#### public abstract void onComplete (DatabaseError error, DatabaseReference ref)

This method will be triggered when the operation has either succeeded or failed. If it has failed, an error will be given. If it has succeeded, the error will be null

##### Parameters

error | A description of any errors that occurred or null on success
ref | A reference to the specified Firebase Database location