Gio.Volume.prototype.eject_with_operation

function eject_with_operation(flags: Gio.MountUnmountFlags, mount_operation: Gio.MountOperation, cancellable: Gio.Cancellable, callback: Gio.AsyncReadyCallback): void {
    // Gjs wrapper for g_volume_eject_with_operation()
}

Ejects a volume. This is an asynchronous operation, and is finished by calling Gio.Volume.prototype.eject_with_operation_finish with the volume and Gio.AsyncResult data returned in the callback.

Since 2.22

flags: flags affecting the unmount if required for eject
mount_operation: a Gio.MountOperation or null to avoid user interaction
cancellable: optional Gio.Cancellable object, null to ignore
callback: a Gio.AsyncReadyCallback, or null