I have a service call that returns a JSON response which is then passed through a data manager that transforms the data if service is success or creates an error body if the call is a failure.

The data manager is written in kotlin and the particular line of code i am interested in is this

val mutableList = mutableListOf<Address>()
return Result.error(errorTransformation(serviceErrors, mutableList))

My errorTransformation class is basically an Exception call and this is written java. The constructor for the exception class is

ExceptionClass(ServiceErrors serviceError ,List<Address> address){
    // initiialize fields here
}

Now When i try to initialize my exception class it says appropriate constructor is found and it is showing me a suggestion to generate one with syntax

ExceptionClass(ServiceErrors serviceError ,List<? extends Address> address){
    // initiialize fields here
}

Why is this happening? I only want List<Address>, not List<? extends Address>.