wp-includes/php-ai-client/src/Common/AbstractEnum.php:344Converts the enum to a JSON-serializable format.
string #[\ReturnTypeWillChange] public function jsonSerialize() { return $this->value; }Introduced in 0.1.0. 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/Common/AbstractEnum.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.