subClasses method
Implementation
Map<String,dynamic> subClasses(Map<String,dynamic> data,{bool keepId=true,keepClassNid=false}){
data=Map.of(data);
if(!keepId)data.remove(consts.dataIdKey);
if(!keepClassNid)data..remove(consts.dataClassNameKey)..remove(consts.dataClassIdKey);
return data..updateAll((k, v) => revertField(v));
}