code: public ArrayList<OvhStreamRule> serviceName_output_graylog_stream_streamId_rule_ruleId_GET(String serviceName, String streamId, String ruleId) throws IOException {
  		String qPath = "/dbaas/logs/{serviceName}/output/graylog/stream/{streamId}/rule/{ruleId}";
  		StringBuilder sb = path(qPath, serviceName, streamId, ruleId);
  		String resp = exec(qPath, "GET", sb.toString(), null);
  		return convertTo(resp, t6);
  	}
docs: Returns details of specified graylog stream rule
  
  REST: GET /dbaas/logs/{serviceName}/output/graylog/stream/{streamId}/rule/{ruleId}
  @param serviceName [required] Service name
  @param streamId [required] Stream ID
  @param ruleId [required] Rule ID