WP_Style_Engine_CSS_Rule::add_declarations( string[]|WP_Style_Engine_CSS_Declarations $declarations ): WP_Style_Engine_CSS_Rule

89	public function add_declarations( $declarations ) {90		$is_declarations_object = ! is_array( $declarations );91		$declarations_array     = $is_declarations_object ? $declarations->get_declarations() : $declarations;92 93		if ( null === $this->declarations ) {94			if ( $is_declarations_object ) {95				$this->declarations = $declarations;96				return $this;97			}98			$this->declarations = new WP_Style_Engine_CSS_Declarations( $declarations_array );99		}100		$this->declarations->add_declarations( $declarations_array );101 102		return $this;103	}