import { ElTreeGridPresentationNode } from './tree-grid.model';
/**
 * Service used to filter tree grid data. Searched searchString in all object values.
 * If you need custom filter, you can extend this service and override filterPredicate or whole filter method.
 */
export declare class ElTreeGridFilterService<T> {
    filter(query: string, data: ElTreeGridPresentationNode<T>[]): ElTreeGridPresentationNode<T>[];
    protected filterPredicate(data: T, searchQuery: string): boolean;
}