AdBreakPlacement.preroll constructor
      
      AdBreakPlacement.preroll({ 
    
- required H5AdBreakDoneCallback? adBreakDone,
 
Convenience factory to create a preroll ad configuration.
The following parameters are available:
adBreakDone: Always called as the last step in anadBreak, even if there was no ad shown. Takes as argument aplacementInfoobject. See AdBreakDonePlacementInfo, and: https://developers.google.com/ad-placement/apis/adbreak#adbreakdone_and_placementinfo
See: https://developers.google.com/ad-placement/apis#prerolls
Implementation
factory AdBreakPlacement.preroll({
  required H5AdBreakDoneCallback? adBreakDone,
}) {
  return AdBreakPlacement(
    type: BreakType.preroll,
    adBreakDone: adBreakDone,
  );
}