import { NzSafeAny } from 'ng-zorro-antd/core/types';
import { ItemToMagTreeNodeOptionsFunc } from './item-to-mag-tree-node-options-func';
import { MagTreeNode } from './mag-tree-node';
export declare class MagTreeNodeBuilder<T> {
    sources: NzSafeAny[];
    roots: MagTreeNode[];
    flatNodes: MagTreeNode[];
    mapOfSources: {
        [key: string]: T;
    };
    mapOfNodes: {
        [key: string]: MagTreeNode;
    };
    flatItems: T[];
    constructor(sources: T[]);
    build(mapFunc: ItemToMagTreeNodeOptionsFunc<T>): void;
    sortNodes(nodes: MagTreeNode[]): MagTreeNode[];
    markChildren(node: MagTreeNode, level: number): void;
    saveFlatList(node: MagTreeNode): void;
    getRoot(): MagTreeNode | null;
    getRoots(): MagTreeNode[];
    getFlatNodes(): MagTreeNode[];
    getFlatItems(): T[];
}