"Method com.example.Source.getSomeVar(): From non-null returning to null returning breaking change."
            )
            assertHasWarnings(
                "Method com.example.Source.setSomeVar(java.lang.String): Parameter 0 nullability changed from non-nullable to nullable"
            )
            assertHasNoInformation()
        }
    }

                    public String[] baz(String bar) { return new String[] {bar}; }
                }
            """
        ) {
            assertHasNoError()
            assertHasWarnings(
                "Method com.example.Source.foo(java.lang.String): Return nullability changed from null-unmarked to non-nullable",

                    public String foo(String bar) { return bar; }
                }
            """
        ) {
            assertHasNoError()
            assertHasWarnings(
                "Field finalField: Nullability changed from nullable to non-nullable",
                "Method com.example.Source.foo(java.lang.String): Return nullability changed from nullable to non-nullable"
            )