code: @Override
      public final Iterable<SubmissionDocument> findAll(
              final RootDocument rootDocument) {
          final Iterable<SubmissionDocument> submissionDocuments =
                  findAll(rootDocument.getFilename());
          if (submissionDocuments == null) {
              return null;
          }
          for (final SubmissionDocument submDocument : submissionDocuments) {
              final Submission submission = submDocument.getGedObject();
              submission.setParent(rootDocument.getGedObject());
          }
          return submissionDocuments;
      }
docs: {@inheritDoc}