processEmbeddedDocNames(embeddedFileNames, writer);
            } else {
                final List<PDNameTreeNode<PDComplexFileSpecification>> kids = efTree.getKids();
                if (kids == null) {
                    return;
                }
                for (final PDNameTreeNode<PDComplexFileSpecification> node : kids) {
                    processEmbeddedDocNames(node.getNames(), writer);
                }