function main_menu_url() {
			$this->_logger->entrance();

			if ( $this->_is_top_level ) {
				$menu = $this->find_top_level_menu();
			} else {
				$menu = $this->find_main_submenu();
			}

			$parent_slug = isset( $menu['parent_slug'] ) ?
                $menu['parent_slug'] :
                'admin.php';

			return admin_url( $parent_slug . '?page=' . $menu['menu'][2] );
		}