flags affecting the operation
a GMountOperation, or NULL to avoid user interaction.
optional GCancellable object, NULL to ignore. [allow-none]
a GAsyncReadyCallback to call when the request is satisfied, or NULL. [scope async]
the data to pass to callback function. closure
Unmounts a file of type G_FILE_TYPE_MOUNTABLE. If cancellable is not NULL, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error G_IO_ERROR_CANCELLED will be returned. When the operation is finished, callback will be called. You can then call g_file_unmount_mountable_finish() to get the result of the operation. Since 2.22