docs: public <C> Maybe<DbxEntry./*@Nullable*/WithChildrenC<C>> getMetadataWithChildrenIfChangedC(
              String path, boolean includeMediaInfo, /*@Nullable*/String previousFolderHash, Collector<DbxEntry,? extends C> collector)
          throws DbxException
      {
          return getMetadataWithChildrenIfChangedBase(path, includeMediaInfo, previousFolderHash, new DbxEntry.WithChildrenC.ReaderMaybeDeleted<C>(collector));
      }