AI-generated Key Takeaways
- 
          ReservationStatus represents the inventory reservation status for ProposalLineItem objects. 
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          The possible values for ReservationStatus are RESERVED, NOT_RESERVED, RELEASED, CHECK_LINE_ITEM_RESERVATION_STATUS, and UNKNOWN. 
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          RESERVED means the inventory is reserved, while NOT_RESERVED indicates the inventory is never reserved. 
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          RELEASED signifies that inventory was once reserved but is now released. 
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          CHECK_LINE_ITEM_RESERVATION_STATUS means the reservation status of the corresponding LineItem should be used. 
Represents the inventory reservation status for ProposalLineItem objects.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202505
| Enumeration | Description | 
|---|---|
| RESERVED | The inventory is reserved. | 
| NOT_RESERVED | The proposal line item's inventory is never reserved. | 
| RELEASED | The inventory is once reserved and now released. | 
| CHECK_LINE_ITEM_RESERVATION_STATUS | The reservation status of the corresponding LineItem should be used for this ProposalLineItem. | 
| UNKNOWN | The value returned if the actual value is not exposed by the requested API version. |