Type of the callback function used by DARegisterDiskUnmountApprovalCallback().
- macOS 10.4+
- Mac Catalyst 13.0+
A disk object.
The user-defined context parameter given to the registration function.
A dissenter reference. Pass NULL to approve.
The caller of this callback receives a reference to the returned object. The caller also implicitly retains the object and is responsible for releasing it with CFRelease().