wp-includes/class-wp-block-patterns-registry.php:254Checks if a block pattern is registered.
$pattern_namestring|nullbool public function is_registered( $pattern_name ) { return isset( $pattern_name, $this->registered_patterns[ $pattern_name ] ); }Introduced in 5.5.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
$pattern_name retyped from string to string|null.verified against sourcesrc/wp-includes/class-wp-block-patterns-registry.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.