Gets the journal data associated to this command (on journal playback). 
   Namespace:   Autodesk.Revit.UI.Events  
  Assembly:   RevitAPIUI  (in RevitAPIUI.dll) Version: 17.0.0.0 (17.0.1090.0) 
  Since:  2017 
Syntax
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Remarks
 For details about the use of journal data associated to a command, see ExternalCommandData.JournalData.