import { IEnvOptionsObject, UnifiedEnvReturnObject, IUnifiedEnvOptions, IFileOptions } from './utils/interfaces';
export declare class UnifiedEnv<T extends IEnvOptionsObject, A> {
    private _expectedEnvVariables;
    private _returnConfig;
    private _errors;
    private _unifiedEnvOptions;
    private _hasGeneratedConfig;
    constructor(expectedEnvVariables: T, configOptions?: Partial<IUnifiedEnvOptions>);
    env(): this;
    argv(): this;
    file(fileOptions?: Partial<IFileOptions>): this;
    generate(): Readonly<UnifiedEnvReturnObject<T>>;
    private _log;
    private _loopThroughResults;
    private _addValueToConfig;
    private _preformTieBreaker;
    private _parseExpectedVariable;
    private _setReturnedConfigValue;
    private _addErrorMessage;
}