private Map<String, Object> getReportPluginGraphData(long id, String plugin, String kind, int imgWidth) {
		int interval = perfTestService.getReportPluginGraphInterval(id, plugin, kind, imgWidth);
		Map<String, Object> pluginMonitorData = perfTestService.getReportPluginGraph(id, plugin, kind, interval);
		final PerfTest perfTest = perfTestService.getOne(id);
		int samplingInterval = 3;
		if (perfTest != null) {
			samplingInterval = perfTest.getSamplingInterval();
		}
		pluginMonitorData.put("interval", interval * samplingInterval);
		return pluginMonitorData;
	}
Get the plugin monitor data of the target.

@param id       test Id
@param plugin   monitor plugin category
@param kind     kind
@param imgWidth image width
@return json message
ngrinder-controller/src/main/java/org/ngrinder/perftest/controller/PerfTestApiController.java