We're happy to announce that 
v201902 of the Google Ad Manager API is available starting today. The two main areas that are getting new API functionality are forecasting and video.
In v201902, you can set 
LineItems to be paced based on their projected traffic instead of their historical traffic by setting 
DeliveryForecastSource to 
FORECASTING. This API version also adds the 
AdjustmentService to manage traffic forecast adjustments. For example, if you’re expecting an increase in traffic for an upcoming holiday, you can manually adjust your forecasts to take that increase into consideration.
There are also several updates to video features in this version of the API. You can now target 
LineItems by 
CmsMetadataValues (content targeting) and custom 
AdSpots (position targeting). 
For a full list of API changes in v201902, see the 
release notes.
For questions about this or any other API changes, reach out to us on the 
Ad Manager API forum.