public static PushNotificationPayload sound(String sound) {
		if (sound == null) throw new IllegalArgumentException("Sound name cannot be null");
		PushNotificationPayload payload = complex();
		try {
			payload.addSound(sound);
		} catch (JSONException e) {
		}
		return payload;
	}
public static PushNotificationPayload sound ( String sound ) { if ( sound == null ) throw new IllegalArgumentException ( "Sound name cannot be null" ) ; PushNotificationPayload payload = complex ( ) ; try { payload . addSound ( sound ) ; } catch ( JSONException e ) { } return payload ; }
Create a pre-defined payload with a sound name.

@param sound the name of the sound
@return a ready-to-send payload