Is there an easy way to wrap a `MutableStateFlow` so that I can do something with new values before ...

# flow

[Marc Knaup]

Is there an easy way to wrap a MutableStateFlow so that I can do something with new values before they are sent downstream?

E.g.

fun <Value: Any> persistedFlow(key: String, serializer: KSerializer<Value>): MutableStateFlow<Value?> =
	save(MutableStateFlow(value = load(key, serializer)), key, serializer)

How would I implement save?

According to the docs:

The MutableStateFlow interface is not stable for inheritance in 3rd party libraries (…)

[gildor]

Well, if you need stable api in your library you cannot implement MutableStateFlow