CMMemory is called the pool's allocator stops recycling memory.
- iOS 6.0+
- macOS 10.8+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 6.0+
- Core Media
When this method is called the pool deallocates any memory it was holding for recycling. Deallocation also happens when the retain count of the
CMMemory drops to zero, though under GC deallocation may be delayed.