codegenerator

The spec mentioned "The Placement group comprises objects that define the set of allowed ads and behaviors for a given placement. This might include mechanical information (e.g., sizes, supported mime...

Sometimes we need logical expression on `bcat`, `badv`, `battr`, etc on block/allow restriction fields, For example, `IF advertiser = X THEN allow_category = A ELSE block_category = [B, C]`, such...