UFile (package = ) [public final class ElvisKt {...]
    UClass (name = ElvisKt) [public final class ElvisKt {...}]
        UMethod (name = foo) [public static final fun foo(bar: java.lang.String) : java.lang.String {...}]
            UParameter (name = bar) [var bar: java.lang.String]
            UBlockExpression [{...}]
                UReturnExpression [return null]
                    ULiteralExpression (value = null) [null] : PsiType:Void
        UMethod (name = bar) [public static final fun bar() : int {...}]
            UBlockExpression [{...}]
                UReturnExpression [return 42]
                    ULiteralExpression (value = 42) [42] : PsiType:int
        UMethod (name = baz) [public static final fun baz() : java.lang.String {...}]
            UBlockExpression [{...}] : PsiType:Void
                UReturnExpression [return [!] UnknownKotlinExpression (BINARY_EXPRESSION)] : PsiType:Void
                    [!] UnknownKotlinExpression (BINARY_EXPRESSION) [[!] UnknownKotlinExpression (BINARY_EXPRESSION)]
