Extract files to given path.
If path is NULL then the files are decompressed to memory blobs stored on each File
.
| this |
a Cabinet |
| path |
the path to extract files |
| file_callback |
an optional File callback, return false to filter out or skip files. |
| progress_callback |
a progress callback |
| cancellable |
optional Cancellable object, null to ignore |
| user_data |
callback data |
|
true on success. |