ListStrategy::getPreparedItems

protected function getPreparedItems(array $parameters = []): array
{
	$entityTypeId = $this->getEntityTypeId();
	$fieldsCollection = $this->getFieldsCollection();
	$fieldsMap = $this->getFieldsMap();

	$displayedFields = $this->getDisplayedFields($fieldsCollection, $fieldsMap);

	$parameters['select'] = $this->getSelectFields($displayedFields);
	$items = $this->getItems($entityTypeId, $parameters);
	$this->appendRelatedEntitiesValues($items);
	$this->prepareActivityCounters($items);

	return $items;
}