/**
 * Generate names: a, b, c,... aa, ab, ac.. ba, bb, bc...
 */
export default class NameMangler {
    current?: string[];
    mangled: {
        [name: string]: string;
    };
    private leadingChars;
    private candidateChars;
    private blackList;
    constructor(opts?: {
        leadingCharRanges?: string[];
        candidateCharRanges?: string[];
        blackList?: string[];
    });
    private next;
    mangle(name: string): string;
}