code: public static String fromClassPath() {
          Set<String> versions = new HashSet<>();
          try {
              ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
              Enumeration<URL> manifests = classLoader.getResources("META-INF/MANIFEST.MF");
  
              while (manifests.hasMoreElements()) {
                  URL manifestURL = manifests.nextElement();
                  try (InputStream is = manifestURL.openStream()) {
                      Manifest manifest = new Manifest();
                      manifest.read(is);
  
                      Attributes buildInfo = manifest.getAttributes("Build-Info");
                      if (buildInfo != null) {
                          if (buildInfo.getValue("Selenium-Version") != null) {
                              versions.add(buildInfo.getValue("Selenium-Version"));
                          } else {
                              // might be in build-info part
                              if (manifest.getEntries() != null) {
                                  if (manifest.getEntries().containsKey("Build-Info")) {
                                      final Attributes attributes = manifest.getEntries().get("Build-Info");
  
                                      if (attributes.getValue("Selenium-Version") != null) {
                                          versions.add(attributes.getValue("Selenium-Version"));
                                      }
                                  }
                              }
                          }
                      }
                  }
              }
          } catch (Exception e) {
              logger.log(Level.WARNING,
                  "Exception {0} occurred while resolving selenium version and latest image is going to be used.",
                  e.getMessage());
              return SELENIUM_VERSION;
          }
  
          if (versions.isEmpty()) {
              logger.log(Level.INFO, "No version of Selenium found in classpath. Using latest image.");
              return SELENIUM_VERSION;
          }
  
          String foundVersion = versions.iterator().next();
          if (versions.size() > 1) {
              logger.log(Level.WARNING, "Multiple versions of Selenium found in classpath. Using the first one found {0}.",
                  foundVersion);
          }
  
          return foundVersion;
      }
docs: Returns current selenium version from JAR set in classpath.
  
  @return Version of Selenium.