Support Map<String, T> in JsonSerializer.toJson(Object)

[Legioth]

Description of the bug

When dealing with dynamic data in e.g. LitRenderer.withProperty, it is tempting to use a java.util.Map to represent the data. This does currently not work as expected since the map instance goes down to the Introspector.getBeanInfo(type) branch which doesn't do anything meaningful for a map.

Expected behavior

Expected that myRenderer.withProperty("foo", ignore -> Map.of("foo", "bar")) would send {"foo": "bar"} as JSON to the client.

Minimal reproducible example

See above

Versions

• Vaadin / Flow version: 24.6.0