export declare abstract class EnvService {
    abstract getEnvValue(key: string): Promise<string | null>;
    abstract setEnvValue(key: string, value: string): Promise<void>;
}
export declare class FileEnvService extends EnvService {
    private static readonly ENV_KEY_REGEX;
    private readonly filePath;
    private validateEnvEntry;
    constructor(filePath: string);
    private envLineRegex;
    private updateEnvData;
    getEnvValue(key: string): Promise<string | null>;
    setEnvValue(key: string, value: string): Promise<void>;
}
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