set_selector example

    public function __construct( $selector = '', $declarations = array() ) {
        $this->set_selector( $selector );
        $this->add_declarations( $declarations );
    }

    /** * Sets the selector. * * @since 6.1.0 * * @param string $selector The CSS selector. * @return WP_Style_Engine_CSS_Rule Returns the object to allow chaining of methods. */