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