Logs an impression.
Logs an impression. By default, impression logging is done automatically when using com.gravity.gdk.placement.Placement.getRecos. You only need to manually log an impression using this method if you are passing FALSE for the logImpression param to com.gravity.gdk.placement.Placement.getRecos.
The future returned by com.gravity.gdk.placement.Placement.getRecos.
If provided, should resolve with the articles to log in the impression. Normally you would provide ALL the articles from recoResult; if that is the case you can omit this param and the articles in the recoResult param will be used. However, in instances where you wish to, say, rearrange or omit articles from recoResult, then you will want to indicate which articles you are actually considering for the impression by passing them in this param.
HTTP status code of the impression log result.