//file import kotlinApi.KotlinTrait; import org.jetbrains.annotations.NotNull; import org.jetbrains.annotations.Nullable; class C { void foo() { KotlinTrait t = new KotlinTrait() { @Nullable @Override public String nullableFun() { return null; } @NotNull @Override public String notNullableFun() { return ""; } @Override public int nonAbstractFun() { return 0; } }; } }