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  | Quintiq file version 2.0 
 |  #parent: #root 
 |  Method CheckContainsEvent ( 
 |    structured[Object] selection_i 
 |  ) as Boolean id:Method_LibCal_dlgSubscribeToEvent_CheckContainsEvent 
 |  { 
 |    #keys: '[146730.0.226427428]' 
 |    Body: 
 |    [* 
 |      feedback  := FeedbackObject::LocalFeedback(); 
 |      isAllowed := exists( selection_i, Elements.astype( LibCal_LeadingParticipation ), element, true, true ); 
 |       
 |      if( not feedback.CheckHard( isAllowed ) ) 
 |      { 
 |        feedback.AddHard( Translations::Event_SelectAtLeastOne() ); 
 |      } 
 |       
 |      return isAllowed; 
 |    *] 
 |  } 
 |  
  |