import { Env, EnvActions } from "./sys-env.js";
export declare class ImportMetaEnv implements EnvActions {
    #private;
    readonly importMetaEnv?: Record<string, string> | undefined;
    constructor(ea: EnvActions);
    active(): boolean;
    register(env: Env): Env;
    get(key: string): string | undefined;
    set(key: string, value?: string): void;
    delete(key: string): void;
    keys(): string[];
}
export declare function wrapImportMetaEnv(ea: EnvActions): EnvActions;
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