/**@class android.app.backup.SharedPreferencesBackupHelper
 implements android.app.backup.BackupHelper

@extends android.app.backup.FileBackupHelperBase

 A helper class that can be used in conjunction with
 {@link android.app.backup.BackupAgentHelper} to manage the backup of
 {@link android.content.SharedPreferences}. Whenever a backup is performed, it
 will back up all named shared preferences that have changed since the last
 backup operation.
 <p>
 To use this class, the application's backup agent class should extend
 {@link android.app.backup.BackupAgentHelper}.  Then, in the agent's
 {@link android.app.backup.BackupAgent#onCreate()} method, an instance of this class should be
 allocated and installed as a backup/restore handler within the BackupAgentHelper
 framework.  For example, an agent supporting backup and restore for
 an application with two groups of {@link android.content.SharedPreferences}
 data might look something like this:
 <pre>
 import android.app.backup.BackupAgentHelper;
 import android.app.backup.SharedPreferencesBackupHelper;

 public class MyBackupAgent extends BackupAgentHelper {
     // The names of the SharedPreferences groups that the application maintains.  These
     // are the same strings that are passed to {@link Context#getSharedPreferences(String, int)}.
     static final String PREFS_DISPLAY = "displayprefs";
     static final String PREFS_SCORES = "highscores";

     // An arbitrary string used within the BackupAgentHelper implementation to
     // identify the SharedPreferenceBackupHelper's data.
     static final String MY_PREFS_BACKUP_KEY = "myprefs";

     // Allocate a helper and install it.
     public void onCreate() {
         SharedPreferencesBackupHelper helper =
                 new SharedPreferencesBackupHelper(this, PREFS_DISPLAY, PREFS_SCORES);
         addHelper(MY_PREFS_BACKUP_KEY, helper);
     }
 }</pre>
 <p>
 No further implementation is needed; the {@link android.app.backup.BackupAgentHelper} mechanism automatically
 dispatches the
 {@link android.app.backup.BackupAgent#onBackup(android.os.ParcelFileDescriptor, BackupDataOutput, android.os.ParcelFileDescriptor) android.app.backup.BackupAgent.onBackup()}
 and
 {@link android.app.backup.BackupAgent#onRestore(BackupDataInput, int, android.os.ParcelFileDescriptor) android.app.backup.BackupAgent.onRestore()}
 callbacks to the SharedPreferencesBackupHelper as appropriate.
*/
var SharedPreferencesBackupHelper = {

/**Backs up the configured {@link android.content.SharedPreferences} groups.
*/
performBackup : function(  ) {},

/**Restores one entity from the restore data stream to its proper shared
 preferences file store.
*/
restoreEntity : function(  ) {},


};