wp-includes/IXR/class-IXR-client.php:152 function getResponse() { // methodResponses can only have one param - return that return $this->message->params[0]; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/IXR/class-IXR-client.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.