docs: private static InputStream getInputStream(String libPath) throws IOException {
      Preconditions.checkArgument(
          (libPath.endsWith(".jar") || libPath.endsWith(".aar")) && Files.exists(Paths.get(libPath)),
          "invalid library path! " + libPath);
      LOG(VERBOSE, "Info", "opening library: " + libPath + "...");
      InputStream jarIS = null;
      if (libPath.endsWith(".jar")) {
        jarIS = new FileInputStream(libPath);
      } else if (libPath.endsWith(".aar")) {
        ZipFile aar = new ZipFile(libPath);
        ZipEntry jarEntry = aar.getEntry("classes.jar");
        jarIS = (jarEntry == null ? null : aar.getInputStream(jarEntry));
      }
      return jarIS;
    }