UFile (package = )
    UClass (name = StringTemplateWithVarKt)
        UField (name = bar)
            ULiteralExpression (value = "bar")
        UField (name = f)
            UPolyadicExpression (operator = +)
                ULiteralExpression (value = "foo")
                USimpleNameReferenceExpression (identifier = bar)
        UMethod (name = getBar)
        UMethod (name = getF)
