(although they certainly may be persuasive).” Mathai v. Warren, 512 F.3d 1241, 1248 (10th Cir.2008). “For purposes of most bankruptcy proceedings, property interests are created and defined by state law. Once that state law determination is made, however, we must still look to federal bankruptcy law to resolve the extent to which that interest is property of the estate” under § 541. Parks v. FIA Card Servs., N.A., 550 F.3d 1251, 1255 (10th Cir.2008) (citations and quotations omitted); 11 U.S.C. § 541(a)(1). We first consider whether and to what extent Debtors have an interest in the SARs under Kansas law. Butner v. United States, 440 U.S. 48, 55, 99 S.Ct. 914, 59 L.Ed.2d 136 (1979); see, e.g., Williamson v. Hall, No. KS-08-088, 2009 WL 4456542, at *8 (10th Cir. BAP Dec. 4, 2009) (<HOLDING>). We then consider whether that interest
holding that a debtors interest in a tenancy by the entirety is property of the bankruptcy estate under section 541 because of debtors undivided present interests in the use possession income and right of survivorship of the property holding contingent prepetition property rights were sufficiently rooted in the prebankruptcy past to be part of the bankruptcy estate under 11 usc  541 holding that pay on death accounts were not part of the bankruptcy estate under  541 because under kansas law debtor had no property interest in the accounts until the death of the owner holding inmates possess a constitutionally cognizable property interest in the interest earned on money held in their prison accounts holding that because prisoner did not have private property interest in his prison accounts there could be no unconstitutional taking