registerValue
abstract fun registerValue(key: String, valueProvider: RetainedValueProvider): RetainedStateRegistry.Entry(source)
Registers the value provider.
There are could be multiple providers registered for the same key. In this case the order in which they were registered matters.
Say we registered two values for the key. One provides "1", second provides "2". this case will have listOf("1", "2) as a value for the key in the underlying map. And later, when the registry will be recreated with the previously saved values, the first execution of consumeValue would consume "1" and the second one "2".
Return
the registry entry which you can use to unregister the provider
Parameters
key
Key to use for storing the value
valueProvider
The value to provide