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
Starts an asynchronous eject on a mountable. When this operation has completed, callback will be called with user_user data, and the operation can be finalized with g_file_eject_mountable_with_operation_finish(). 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. Since 2.22