setTags(...$this->tags);
$children = call_user_func($params['childGenerator'], $childFactory);
if ( is_array($children) ) {
$expectedIdPrefix = $this->getId() . '.';
$idPrefixLength = strlen($expectedIdPrefix);
foreach ($children as $child) {
//This is a hack. There's no convenient way to pass the child key
//from the factory to this constructor. So the factory keeps a list
//of IDs and keys, and we use that or fall back to stripping our
//prefix from the ID.
$id = $child->getId();
$childKey = $childFactory->getChildKeyFromId($id);
if ( $childKey === null ) {
if ( substr($id, 0, $idPrefixLength) === $expectedIdPrefix ) {
$childKey = substr($id, $idPrefixLength);
} else {
throw new \InvalidArgumentException('Child setting ID must be prefixed with the parent ID');
}
}
$this->registerChild($childKey, $child);
}
}
}
}
//Make this public, allowing external code to add children.
public function createChild($childKey, $className, ...$constructorParams) {
return parent::createChild($childKey, $className, ...$constructorParams);
}
}