Hi there, can anyone help me resolve this Intellij...

# codereview

[csturtevant]

Hi there, can anyone help me resolve this Intellij warning?
Type mismatch: inferred type is (Mutable)List<Task!>? but MutableList<Task> was expected

I’m writing a Kotlin class implementing this interface method:

List<Task> getTasksReport(@NonNull String filter);

The Kotlin implementation is:

override fun getTasksReport(filter: String): MutableList<Task> {
        val response = todoistRestClient.getTasks(TODAY_FILTER)
        val tasks = response.body
        println(tasks)
        return tasks
    }

Would changing the Kotlin by adding the cast to the return to the following be the best implementation?:

override fun getTasksReport(filter: String): MutableList<Task> {
        val response = todoistRestClient.getTasks(TODAY_FILTER)
        val tasks = response.body
        println(tasks)
        return tasks as MutableList<Task>
    }

[Matteo Mirk]

the warning is caused by the compiler not being able to determine the nullability of Java types, so I guess casting is the only option