code: protected void extractResult(Session session, Health.Builder builder)
  			throws Exception {
  		Result result = session.query(CYPHER, Collections.emptyMap());
  		builder.up().withDetail("nodes",
  				result.queryResults().iterator().next().get("nodes"));
  	}
docs: Provide health details using the specified {@link Session} and {@link Builder
  Builder}.
  @param session the session to use to execute a cypher statement
  @param builder the builder to add details to
  @throws Exception if getting health details failed