import type { CreateElement } from 'vue';
import ElSelectTree from './ElSelectTree';
import { VirtualStore } from './virtual-list';
export default class ElSelectTreeVirtual extends ElSelectTree {
    filterDebounceDuration: number;
    virtualStore: VirtualStore;
    onDataChange(): void;
    onExpandedKeysChange(val: any): void;
    render(h: CreateElement): import("vue").VNode;
    private virtualExpandedKeys;
    private get _expandedKeys();
    private _getSelectVNodeData;
    private _getTreeVNodeData;
    private filterState;
    private debounceTimeId;
    protected _filterMethod(val?: string): any;
}