docs: public static byte[] copyCredToken(byte[] credToken) {
  
          if (credToken == null) {
              return null;
          }
  
          final int LEN = credToken.length;
          if (LEN == 0) {
              return new byte[LEN];
          }
  
          byte[] newCredToken = new byte[LEN];
          System.arraycopy(credToken, 0, newCredToken, 0, LEN);
  
          return newCredToken;
      }