wp-includes/php-ai-client/src/Files/ValueObjects/MimeType.php:116Gets the primary known file extension for this MIME type.
string public function toExtension(): string { // Reverse lookup for the MIME type to find the extension. $extension = array_search($this->value, self::$extensionMap, \true); if ($extension === \false) { throw new InvalidArgumentException(sprintf('No known extension for MIME type: %s', $this->value)); } return $extension; }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/Files/ValueObjects/MimeType.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.