export declare class Node {
    char: string | null;
    isMatch: boolean;
    parent: Node | null;
    backNode: Node | null;
    children: Record<string, Node>;
    constructor(params: {
        char: string | null;
        parent?: Node;
        back_node?: Node;
        is_match?: boolean;
    });
    getChildNodeList(): Node[];
    setChildren(params: {
        char: string;
        root: Node;
        is_match: boolean;
    }): Node;
}