1 open class A { foonull2 fun foo() { 3 } 4 } 5 6 open class B { barnull7 fun bar() { 8 } 9 } 10 11 class C : A { xyzzynull12 fun xyzzy() { 13 } 14 15 companion object : B () { shazamnull16 fun shazam() 17 } 18 } 19