import { Trie } from './trie';
export declare function buildTrie(words: Iterable<string>): Trie;
export declare class TrieBuilder {
    private count;
    private readonly signatures;
    private readonly cached;
    private readonly transforms;
    private _eow;
    /** position 0 of lastPath is always the root */
    private lastPath;
    private tails;
    constructor(words?: Iterable<string>);
    private set _root(value);
    private get _root();
    private signature;
    private _canBeCached;
    private tryCacheFrozen;
    private freeze;
    private tryToCache;
    private storeTransform;
    private addChild;
    private buildTail;
    private _insert;
    insertWord(word: string): void;
    insert(words: Iterable<string>): void;
    /**
     * Resets the builder
     */
    reset(): void;
    build(consolidateSuffixes?: boolean): Trie;
}