<itemvalue="A provider that merges multiple providers into a single linear widget tree. It is used to improve readability and reduce boilerplate code of having to nest multiple layers of providers."/>
<itemvalue="Whether the runtime has null safe sound mode enabled. In sound mode, all code is null safe and null safety is enforced everywhere. Nullability in generics is also enforced, which is how this code detects sound mode. In unsound mode, there can be a mix of null safe and legacy code. Some null checks are not done, and generics are not compared for null safety."/>