@CanIgnoreReturnValue
    public Builder setClockSkew(Duration clockSkew) {
      if (clockSkew.compareTo(MAX_CLOCK_SKEW) > 0) {
        throw new IllegalArgumentException("Clock skew too large, max is 10 minutes");
      }
      this.clockSkew = clockSkew;
      return this;
    }
Sets the clock skew to tolerate when verifying timestamp claims, to deal with small clock
differences among different machines.

<p>As recommended by https://tools.ietf.org/html/rfc7519, the clock skew should usually be no
more than a few minutes. In this implementation, the maximum value is 10 minutes.
java_src/src/main/java/com/google/crypto/tink/jwt/JwtValidator.java