Fix behavior
Fix object deletion for in-memory file manager
Add cost limit
Add TODOs
Remove entries from the file dictionary when elements in the cache are discarded
Fix issues to successfully pass tests
Fix issues to successfully pass tests
Fix file and folder copy
Implement efficient move
Add test cases regarding recursive copy / move. Fix implementations
Fix tests to take into account optional stream and URL support
Rename totalCostLimit as byteCostLimit. Fix imports