AI-generated Key Takeaways
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ContendingLineItem describes line items competing for a forecast.
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The
lineItemIdfield specifies the ID of the contending line item. - 
          
The
contendingImpressionsfield indicates the number of impressions contested by both line items and served to the contending line item in the simulation. 
Describes contending line items for a Forecast.
- Namespace
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https://www.google.com/apis/ads/publisher/v202508 
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                            The Id of the contending line item.  | 
                  
                        
                           
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                            Number of impressions contended for by both the forecasted line item and this line item, but served to this line item in the forecast simulation.  |