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  | Quintiq file version 2.0 
 |  #parent: #root 
 |  MethodOverride GetCost ( 
 |    const AccountAssignment accountassignment, 
 |    const UnitPeriod unitperiod 
 |  ) const declarative remote as const AccountCost 
 |  { 
 |    TextBody: 
 |    [* 
 |      accountcost := constnull( AccountCost );  
 |      lane := this.Lane(); 
 |       
 |      // Refer to lane leg costs when boolean is true, if it does not have cost, then return null account cost 
 |      accountcost := maxselect( this, 
 |                                LaneLegCost, 
 |                                cost, 
 |                                cost.AccountAssignment() = accountassignment 
 |                                and cost.Start() <= unitperiod.StartDate(), 
 |                                cost.Start() ); 
 |       
 |      // If boolean is false, use lane's cost. 
 |      if( isnull( accountcost ) ) 
 |      { 
 |        accountcost := maxselect( lane, 
 |                                  LaneCost, 
 |                                  cost, 
 |                                  cost.AccountAssignment() = accountassignment 
 |                                  and cost.Start() <= unitperiod.StartDate(), 
 |                                  cost.Start() ); 
 |      } 
 |       
 |      return accountcost; 
 |    *] 
 |  } 
 |  
  |