====== retrieveFromHold() ======
call.retrieveFromHold() retrieves a call from [[ixnx:wrtc:js:api:call:putonhold|hold]], starts transmitting media again.

If a call was put on hold by [[ixnx:wrtc:js:api:call:putonhold|call.putOnHold()]] it can be restored to a normal call again by call.retrieveFromHold().

Please notice: if the call was put on hold by other end it cannot be retrieved by us, only by other end.

===== Arguments =====
None.

===== Returns =====
Nothing.

===== Events =====
call.retrieveFromHold() raises no events, but other end will get a [[ixnx:wrtc:js:api:wrtc:onhold|wrtc.onHold()]] event.