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 | | Quintiq file version 2.0 |  | #parent: #root |  | DeclarativeReferenceRelation CalcUnitPeriod |  | { |  |   #keys: '1[113694.1.869473368]' |  |   Expression: |  |   [* |  |     // guard in case unit isnull |  |     periodspecificationinunit := guard( this.Unit().GetPeriodSpecificationInUnitForActuals(), null( PeriodSpecificationInUnit ) ) |  |     return select ( periodspecificationinunit, UnitPeriod,  |  |                    up, |  |                    up.StartDate() = this.Date() ); |  |   *] |  |   Relation: UnitPeriod |  | } | 
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