@Expose(serialize=true, deserialize=true) ignored for transient fields

Even when setting a field explicitly as exposed,
it is not serialized/deserialized for gson if it is transient.
The @Expose annotation should have precedence over the excludeFieldsWithModifiers()-rule.
Not the other way around.

This behavior makes certain combinations with Java Serialisation impossible.

The workaround of GsonBuilder().excludeFieldsWithModifiers(Modifier.STATIC)
is a global modification of how Gson behaves and thus has side effects for unrelated fields.