checker/tests/nullness/java8inference/InferenceSimpler.java

// Test case for Issue 979:
// https://github.com/typetools/checker-framework/issues/979

import java.util.List;

@SuppressWarnings("nullness") // don't bother with implementations
class ISOuter {
  static <V> List<V> wrap(V value) {
    return null;
  }

  static <T> List<T> empty() {
    return null;
  }
}

public class InferenceSimpler {
  List<List<String>> foo() {
    return ISOuter.wrap(ISOuter.empty());
  }
}