import { IConfigurationBackend, TGetParamOptions } from "../interfaces/config-backend.interface";
export declare abstract class BaseConfigurationBackend implements IConfigurationBackend {
    /**
     * The Kubernetes Namespace name.
     */
    readonly nodeEnv: string;
    protected abstract readonly data: {
        [key: string]: any;
    };
    get(key: string, options?: TGetParamOptions): any;
    protected validateValue(value: any, key: any, options?: TGetParamOptions): void;
    protected parseValue(value: any, defaultValue?: TGetParamOptions["defaultValue"]): any;
    protected transformValue(value: any, key: any, cls?: TGetParamOptions["cls"]): any;
    protected parseBooleanValue(value: any, key: string): boolean;
    protected parseNumber(value: any): number;
    protected parseArray(value: any, key: string): string[];
}
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