/**
 * TaskRow 列级 Slot 管理
 * 管理从 GanttChart 注入的列级自定义 slots
 */
export declare function useTaskRowColumnSlots(): {
    columnSlots: Readonly<{
        [name: string]: import('vue').Slot<any> | undefined;
    }>;
    hasColumnSlot: (columnKey: string) => boolean;
    renderColumnSlot: (columnKey: string, slotProps: any) => import('vue').VNode<import('vue').RendererNode, import('vue').RendererElement, {
        [key: string]: any;
    }>[] | null;
};