type Colorizer = (x: string) => string;
export declare class PrintableTree {
    private readonly lines;
    constructor(...lines: string[]);
    get empty(): boolean;
    emit(x: string): void;
    addTree(tree: PrintableTree): this;
    addBullets(trees: PrintableTree[]): this;
    addBullet(last: boolean, tree: PrintableTree): this;
    /**
     * Indent the lines in this printable tree
     */
    indent(n: number): this;
    /**
     * Prefix all lines of the tree with the given list of cells.
     *
     * The first line will be prefixed with `first`.
     *
     * The other lines will be prefixed with `rest` if given, or the length of
     * `first` in spaces if rest is not given.
     */
    prefix(first: string[], rest?: string[]): this;
    newline(): this;
    colorize(colorizer: Colorizer): this;
    toString(): string;
}
export {};