Memory management - freeing memory for unused dependencies

[ondrejstasek]

Is there a way to manually or, even better, automatically free the memory of no-longer-used dependencies?

For example, we have a dependency that is quite memory-heavy, but the user needs it only on specific screens. Once the user navigates out of this context, the dependency will not be used again. It would be great if we could define a scope in which the dependency should live, and once the app is out of that scope, the memory for these dependencies could be freed.