code: private synchronized static void loadNativeLibrary()
      {
          if (!isLoaded) {
              try {
                  nativeLibFile = findNativeLibrary();
                  if (nativeLibFile != null) {
                      // Load extracted or specified snappyjava native library.
                      System.load(nativeLibFile.getAbsolutePath());
                  } else {
                      // Load preinstalled snappyjava (in the path -Djava.library.path)
                      System.loadLibrary("snappyjava");
                  }
              }
              catch (Exception e) {
                  e.printStackTrace();
                  throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, e.getMessage());
              }
              isLoaded = true;
          }
      }
docs: Load a native library of snappy-java