/** FireStore Database  Config  JSON Format. Same as IR8Config.
 */
export declare type IR8ConfigFS = IR8Config;
/**
 * Config Dico used by user,etab,staff,....
 *
 */
export interface IR8Config {
    language?: string;
    theme?: string;
    carteTabsLines?: number;
    carteTabsColumns?: number;
    configs?: {
        [key: string]: any;
    };
}
export declare function ConfigInitialValue(): Partial<IR8Config>;
/** Default Validation Config
 * Throw Error if fail
 */
export declare function CheckConfigIsValid(Obj: Partial<IR8Config> | Partial<IR8ConfigFS>): void;
/** Default Validation Config
 * return Error message if failure
 */
export declare function ConfigIsValid(Obj: Partial<IR8Config> | Partial<IR8ConfigFS>): string;
/** Serialize IR8Config to Firestore JSON */
export declare function Config2JSON(Obj: Partial<IR8Config>): IR8ConfigFS;
/** Serialize Firestore JSON to IR8Config. json can be undefined */
export declare function JSON2Config(json: Partial<IR8ConfigFS> | undefined, target: IR8Config): void;
/** New Config from Firestore JSON */
export declare function JSONAsConfig(json?: Partial<IR8ConfigFS>): IR8Config;