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[]);
    readonly contents: any;
    readonly overrides: IOverrides[];
    readonly keys: string[];
    getValue<V>(section: string): V;
    override(identifier: string): ConfigurationModel;
    merge(...others: ConfigurationModel[]): ConfigurationModel;
    freeze(): ConfigurationModel;
    private mergeContents(source, target);
    private checkAndFreeze<T>(data);
    private getContentsForOverrideIdentifer(identifier);
    toJSON(): IConfigurationModel;
    setValue(key: string, value: any): void;
    removeValue(key: string): void;
    private addKey(key);
    private removeKey(key);
}