fun kotlin.String.exampleExtensionFunction() {} class UserKlass fun T.erroneousExtensionFunction1() {} fun kotlin.text.Appendable.erroneousExtensionFunction2() {} fun test( exampleReceiver: kotlin.String, receiver1: UserKlass, receiver2: kotlin.text.Appendable ) { exampleReceiver.exampleExtensionFunction() receiver1.erroneousExtensionFunction1() receiver2.erroneousExtensionFunction2() }