private List<FileBinary> readJar() {
        try {
            return pluginJarReader.read(ExtensionFilter.CLASS_FILTER);
        } catch (IOException ex) {
            throw new RuntimeException(pluginConfig.getPluginJarURLExternalForm() + " read fail." + ex.getMessage(), ex);
        }
    }
@author Woonduk Kang(emeroad)
@author jaehong.kim
agent-module/profiler/src/main/java/com/navercorp/pinpoint/profiler/instrument/classloading/PlainClassLoaderHandler.java