export interface NamespaceGeneratorOptions {
    characters?: string;
    forbidden?: string[];
    defaultNamespaces?: string[];
}
export declare class NamespaceGenerator {
    buffer: number[];
    mapping: Map<string, string>;
    rmapping: Map<string, string>;
    forbidden: string[];
    characters: string | null;
    defaultNamespaces: string[];
    constructor(options: NamespaceGeneratorOptions);
    exclude(namespace: string): NamespaceGenerator;
    setCharset(characters: string): NamespaceGenerator;
    reset(): NamespaceGenerator;
    get(key: string): string | null;
    increaseBuffer(i?: number): NamespaceGenerator;
    generateNamespace(): string;
    createNamespace(value: string, isCollision?: boolean): string;
}