onDispose abstract method

void onDispose(void cb())

Adds a listener to perform an operation right before the provider is destroyed.

This typically happen when a provider marked with .autoDispose is no-longer used, or when ProviderContainer.dispose is called.

See also:

• Provider.autoDispose, a modifier which tell a provider that it should destroy its state when no-longer listened.
• ProviderContainer.dispose, to destroy all providers associated with a ProviderContainer at once.

Implementation

void onDispose(void Function() cb);