/** FireStore Database  Modifier  JSON Format. Same as IR8Modifier.
 */
export declare type IR8ModifierFS = IR8Modifier;
/**
 * Articles Modifier
 * ex: Article "Pizza" + Modifier(Level1) "Small" + Modifier(Level2) "Avec Salade" + ....
 *
 */
export interface IR8Modifier {
    plu: string;
    multiply?: number;
    price?: number;
    prices?: {
        [key: number]: number;
    };
}
export declare function ModifierInitialValue(): Partial<IR8Modifier>;
/** Default Validation Modifier
 * Throw Error if fail
 */
export declare function CheckModifierIsValid(Obj: Partial<IR8Modifier> | Partial<IR8ModifierFS>): void;
/** Default Validation Modifier
 * return Error message if failure
 */
export declare function ModifierIsValid(Obj: Partial<IR8Modifier> | Partial<IR8ModifierFS>): string;
/** Serialize IR8Modifier to Firestore JSON */
export declare function Modifier2JSON(Obj: Partial<IR8Modifier>): IR8ModifierFS;
/** Serialize Firestore JSON to IR8Modifier. json can be undefined */
export declare function JSON2Modifier(json: Partial<IR8ModifierFS> | undefined, target: IR8Modifier): void;
/** New Modifier from Firestore JSON */
export declare function JSONAsModifier(json?: Partial<IR8ModifierFS>): IR8Modifier;