wp-includes/class-wp-theme.php:787Perform reinitialization tasks.
public function __wakeup() { if ( $this->parent && ! $this->parent instanceof self ) { throw new UnexpectedValueException(); } if ( $this->headers && ! is_array( $this->headers ) ) { throw new UnexpectedValueException(); } foreach ( $this->headers as $value ) { if ( ! is_string( $value ) ) { throw new UnexpectedValueException(); } } $this->headers_sanitized = array(); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-theme.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.