MyReceiverAnnotation -> UClass (name = MyReceiverAnnotation)
name -> UAnnotationMethod (name = name)
String -> USimpleNameReferenceExpression (identifier = String)
MyReceiverAnnotation -> USimpleNameReferenceExpression (identifier = MyReceiverAnnotation)
String -> USimpleNameReferenceExpression (identifier = String)
foo -> UMethod (name = foo)
this -> USimpleNameReferenceExpression (identifier = this)
length -> USimpleNameReferenceExpression (identifier = length)
MyReceiverAnnotation -> USimpleNameReferenceExpression (identifier = MyReceiverAnnotation)
String -> USimpleNameReferenceExpression (identifier = String)
rx -> [!] UnknownKotlinExpression (PROPERTY)
Regex -> USimpleNameReferenceExpression (identifier = Regex)
get -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
    toRegex -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
