docs: private void writeStartElement(final String qName, final Attributes atts) throws IOException {
          final int attsLen = atts.getLength();
          output.write(LESS_THAN + qName);
          for (int i = 0; i < attsLen; i++) {
              final String attQName = atts.getQName(i);
              final String attValue = escapeXML(atts.getValue(i));
              output.write(STRING_BLANK + attQName + EQUAL + QUOTATION + attValue + QUOTATION);
          }
          output.write(GREATER_THAN);
      }