wp-includes/class-wp-block-type.php:587Get all available block attributes including possible layout attribute from Columns block.
array public function get_attributes() { return is_array( $this->attributes ) ? $this->attributes : array(); }Introduced in 5.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-block-type.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.