What is the test for waiving the double jeopardy defense in a plea bargain?

Moreover, unlike other possible scenarios where a collateral attack on the judgment by the prosecution would raise double jeopardy concerns, in the case of a plea bargain the agreement is often structured to avoid double jeopardy defenses. Exactly that was done in this case: pursuant to the terms of the plea bargain that he entered, defendant waived any double jeopardy defense. (Cf. Ricketts v. Adamson (1987) 483 U.S. 1, 9-10, 107 S.Ct. 2680, 2685-2686, 97 L.Ed.2d 1. ⁹ )