If the entities were passed in the "choices" option, this method
does not have any significant overhead. Otherwise, if a query builder
was passed in the "query_builder" option, this builder is now used
to construct a query which is executed. In the last case, all entities
for the underlying class are fetched from the repository.
/** * {@inheritdoc} */ protected function load() { if (!$this->ajax) { parent::load(); } }