docs: void writeStatementRankTriple(Resource subject, StatementRank rank) {
  		try {
  			this.rdfWriter.writeTripleUriObject(subject, RdfWriter.WB_RANK,
  					getUriStringForRank(rank));
  			this.rankBuffer.add(rank, subject);
  
  		} catch (RDFHandlerException e) {
  			throw new RuntimeException(e.getMessage(), e);
  		}
  	}