discussed Cited as authority (rule) State v. Yardley App. 2d 876 , Syl. ¶ 4, 357 P.3d 296 (2015) ("Once a probation violation has been established, whether to revoke the defendant's probation is a discretionary decision for the district court unless a statute specifically provides otherwise."), rev. denied 304 Kan. 1018 3 (2016).