export declare class Namespace<V> {
    readonly parent: Namespace<V> | null;
    readonly prefix: string | null;
    private _bindings;
    readonly allowed_prefixes: Set<string>;
    constructor(parent: Namespace<V> | null, prefix: string | null, allowed_prefixes?: Set<string> | null);
    get bindings(): Map<string, V>;
    prefixed(name: string): string;
    make_namespace(namespace: string | null, name: string): string;
    define(name: string, value: V): boolean;
    overwrite(name: string, value: V): void;
    has_own(name: string): boolean;
    has(name: string): boolean;
    try_lookup_local(name: string): NonNullable<V> | null;
    try_lookup(name: string): V | null;
    try_lookup_namespaced(namespace: string | null, name: string): V | null;
}
export declare class PassthroughNamespace<V> extends Namespace<V> {
    readonly parent: Namespace<V> | null;
    readonly prefix: string | null;
    constructor(parent: Namespace<V> | null, prefix: string | null);
    define(name: string, value: V): boolean;
}