public function getUsedReferenceDefinitions(EntityTypeDefinition $type_definition)
{
$reference_definitions_list = new EntityTypeDefinitionList();
$reference_attributes = $type_definition->getAttributes()->filterByType('entity-reference-list');
foreach ($reference_attributes as $reference_attribute) {
$references_option = $reference_attribute->getOptions()->filterByName('entity_types');
$references = $this->getReferenceDefinitions($references_option->getValue()->toArray());
foreach ($references as $reference) {
if (!$reference_definitions_list->hasItem($reference)) {
$reference_definitions_list->addItem($reference);
}
}
}
$used_embed_types = new EntityTypeDefinitionList();
$embed_type_attributes = $type_definition->getAttributes()->filterByType('embedded-entity-list');
foreach ($embed_type_attributes as $embed_type_attribute) {
$embed_typed_types_opt = $embed_type_attribute->getOptions()->filterByName('entity_types');
$embed_types = $this->getEmbedDefinitions($embed_typed_types_opt->getValue()->toArray());
foreach ($embed_types as $embed_type) {
if (!$used_embed_types->hasItem($embed_type)) {
$used_embed_types->addItem($embed_type);
}
}
}
foreach ($used_embed_types as $embed_type) {
foreach ($this->getUsedReferenceDefinitions($embed_type) as $reference) {
if (!$reference_definitions_list->hasItem($reference)) {
$reference_definitions_list->addItem($reference);
}
}
}
return $reference_definitions_list;
}
