Indeed, the rehabilitative natureof section 1203.4 is what makesit ineffective for granting relief from immigration consequences in mostcases. (Nunez-Reyes v. Holder (9th Cir. 2011) 646 F.3d 684 (en banc); Matter of Roldan (BIA 1999)22 I. & N. Dec. 512; Matter ofPickering (BIA 200 3) 23 I. & N. Dec. 621.) By contrast, a section 1385 dismissal voids the conviction for all purposes.