docs: public ClassGraph blacklistPackages(final String... packageNames) {
          enableClassInfo();
          for (final String packageName : packageNames) {
              final String packageNameNormalized = WhiteBlackList.normalizePackageOrClassName(packageName);
              if (packageNameNormalized.isEmpty()) {
                  throw new IllegalArgumentException(
                          "Blacklisting the root package (\"\") will cause nothing to be scanned");
              }
              // Blacklisting always prevents further recursion, no need to blacklist sub-packages
              scanSpec.packageWhiteBlackList.addToBlacklist(packageNameNormalized);
              final String path = WhiteBlackList.packageNameToPath(packageNameNormalized);
              scanSpec.pathWhiteBlackList.addToBlacklist(path + "/");
              if (!packageNameNormalized.contains("*")) {
                  // Blacklist sub-packages (zipfile entries can occur in any order)
                  scanSpec.packagePrefixWhiteBlackList.addToBlacklist(packageNameNormalized + ".");
                  scanSpec.pathPrefixWhiteBlackList.addToBlacklist(path + "/");
              }
          }
          return this;
      }