anchor.diff:  #source('core/properties/property_object.dart');
   #source('core/properties/property_values.dart');
   #source('core/properties/property.dart');
  -#source('core/tuple.dart');
  
positive.code: #source('core/list_base.dart');
  #source('core/read_only_collection.dart');
  #source('core/grouping.dart');
  #source('core/cloneable.dart');
  #source('core/disposable.dart');
  #source('core/disposable_impl.dart');
  #source('core/global_id.dart');
  #source('core/events/event.dart');
  #source('core/events/event_handle.dart');
  
  
negative.code: 
  #source('core/internal/_simple_set.dart');
  
  #source('core/cloneable.dart');
  #source('core/disposable.dart');
  #source('core/disposable_impl.dart');
  #source('core/global_id.dart');
  #source('core/tuple.dart');
  
  #source('core/requires.dart');
  #source('core/util.dart');
  
  #source('core/select_many.dart');
  #source('core/collection_util.dart');
  #source('core/index_iterator.dart');
  