wp-includes/style-engine/class-wp-style-engine-css-declarations.php:129Adds multiple declarations.
$declarationsstring[]WP_Style_Engine_CSS_Declarations public function add_declarations( $declarations ) { foreach ( $declarations as $property => $value ) { $this->add_declaration( $property, $value ); } return $this; }Introduced in 6.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/style-engine/class-wp-style-engine-css-declarations.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.