Filter the forecast grouped results breakdown by the given rule (Zerkel query) at the ad level.
This rule operates on the following set of numeric fields for all forecast types: impressions, clicks
and uniqueUsers. Additionally, the Available forecast supports the bookedImpressions, bookedClicks
and bookedUniqueUsers fields, and the Deliverable and Existing forecasts the adId, flightId,
campaignId, advertiserId, reservedAdId, reservedFlightId and reservedCampaignId fields.
An extra key, groupedFiltered, is added to the forecast result containing all the results that were
filtered out by the rule. If used in combination with the ResultsBy parameter, the advertiser,
campaign and flight levels won't include the uniqueUsers count.