/**
* Used to inform the loader of its state as a sub loader, or as the top of the chain.
*
* This is important as it ensures that we do not have more than one loader keeping persistent data.
* Subloaders need to be "pure" loaders in the sense that they are used to store and retrieve information from stores or the
* next loader/data source in the chain.
* Nothing fancy, nothing flash.
*
* @param bool $setting
*/
protected function set_is_sub_loader($setting = true)
{
if ($setting) {
$this->subloader = true;
// Subloaders should not keep persistent data.
$this->persist = false;
$this->persistmaxsize = false;
} else {
$this->subloader = true;
$this->persist = $this->definition->should_be_persistent();
if ($this->persist) {
$this->persistmaxsize = $this->definition->get_persistent_max_size();
}
}
}
