perform the undo operation on the given track concode_field_sep int _endIndex concode_elem_sep long _timeOffset concode_elem_sep int _startIndex concode_field_sep String getDescription
void function ( TrackInfo arg0 ) { arg0 . getTrack ( ) . addTimeOffset ( _startIndex , _endIndex , - _timeOffset , true ) ; UpdateMessageBroker . informSubscribers ( ) ; }