wp-includes/php-ai-client/src/Providers/ProviderRegistry.php:500Checks if the given value is a registered provider ID.
$idOrClassNamestringbool private function isRegisteredId(string $idOrClassName): bool { return isset($this->registeredIdsToClassNames[$idOrClassName]); }Introduced in 0.4.0. Unchanged from 7.0.4 through 7.1.0.
Signature, return type and hooks compared across 2 parsed releases.
src/wp-includes/php-ai-client/src/Providers/ProviderRegistry.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.