/**
 * PXM Dropdown Submenu Content Component
 *
 * Used inside <pxm-dropdown-submenu>. Open state is managed by the wrapper.
 * No Shadow DOM, no styling. All appearance is consumer-controlled.
 */
export declare class PxmDropdownSubmenuContent extends HTMLElement {
    private _keydownHandler;
    submenuOpen: boolean;
    connectedCallback(): void;
    disconnectedCallback(): void;
    focusFirstItem(): void;
    private _getItems;
    private _getEnabledItems;
    private _focusItem;
    private _focusNextItem;
    private _focusPrevItem;
    private _onKeyDown;
    private _onSubmenuOpen;
}