UFile (package = )
    UClass (Simple, kind = class)
        UFunction (<init>, kind = constructor, paramCount = 0)
            <no element>
        UVariable (a, kind = member)
            UBinaryExpression (+)
                UBinaryExpression (+)
                    ULiteralExpression ("text")
                    ULiteralExpression ("other")
                ULiteralExpression ("text")
        UVariable (b, kind = member)
            UFunctionCallExpression (UastCallKind(name='function_call'), argCount = 1)
                USimpleReferenceExpression (listOf)
                ULiteralExpression ("A")
        UFunction (test, kind = function, paramCount = 0)
            UBlockExpression
                UQualifiedExpression
                    UQualifiedExpression
                        USimpleReferenceExpression (System)
                        USimpleReferenceExpression (out)
                    UFunctionCallExpression (UastCallKind(name='function_call'), argCount = 1)
                        USimpleReferenceExpression (println)
                        UBinaryExpression (/)
                            ULiteralExpression (5.0)
                            ULiteralExpression (2)