_options = [ 'parent_slug' => ACADLIX_SLUG, 'page_title' => __('Upgrade to Pro', 'acadlix'), 'menu_title' => sprintf('%s', __('Upgrade to Pro', 'acadlix')), // 'capability' => 'acadlix_show_upgrade', 'capability' => 'manage_options', 'menu_slug' => 'acadlix_upgrade', 'callback' => [$this, 'upgrade_callback'], 'position' => 100 ]; } public function get_position() { return $this->_options['position'] ?? 100; } public function add_submenu() { $page = add_submenu_page( $this->_options['parent_slug'], $this->_options['page_title'], $this->_options['menu_title'], $this->_options['capability'], $this->_options['menu_slug'], $this->_options['callback'], $this->_options['position'] ); } public function upgrade_callback() { ?>