import { IConfigurationModel, IOverrides } from '../../../interfaces';
export declare class ConfigurationModel implements IConfigurationModel {
    private _contents;
    private _keys;
    private _overrides;
    private isFrozen;
    constructor(_contents?: any, _keys?: string[], _overrides?: IOverrides[]);
    get contents(): any;
    get overrides(): IOverrides[];
    get keys(): string[];
    isEmpty(): boolean;
    getValue<V>(section: string | undefined): V;
    override(identifier: string): ConfigurationModel;
    merge(...others: ConfigurationModel[]): ConfigurationModel;
    freeze(): ConfigurationModel;
    private mergeContents;
    private checkAndFreeze;
    private getContentsForOverrideIdentifer;
    toJSON(): IConfigurationModel;
    setValue(key: string, value: any): void;
    removeValue(key: string): void;
    private addKey;
    private removeKey;
}