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  | Quintiq file version 2.0 
 |  #parent: #root 
 |  Function CalcFrozenFutureDuration 
 |  { 
 |    TextBody: 
 |    [* 
 |      // derive FrozenFutureDuration from ParentUnit, or from UserFrozenFutureDuration; UserFrozenFutureDuration will take precedence 
 |      value := ifexpr( this.HasUserFrozenFutureDuration(), 
 |                       this.UserFrozenFutureDuration(), 
 |                       this.ParentFrozenFutureDuration() ); 
 |                        
 |      this.FrozenFutureDuration( value ); 
 |    *] 
 |  } 
 |  
  |