/** FireStore Database  BtnProps  JSON Format. Same as IR8BtnProps.
 */
export declare type IR8BtnPropsFS = IR8BtnProps;
/**
 * Btn Properties
 * will be applied to btn css ...
 * TODO may be use css name ....
 *
 */
export interface IR8BtnProps {
    background?: string;
    color?: string;
    fontSize?: string;
    fontFamily?: string;
}
export declare function BtnPropsInitialValue(): Partial<IR8BtnProps>;
/** Default Validation BtnProps
 * Throw Error if fail
 */
export declare function CheckBtnPropsIsValid(Obj: Partial<IR8BtnProps> | Partial<IR8BtnPropsFS>): void;
/** Default Validation BtnProps
 * return Error message if failure
 */
export declare function BtnPropsIsValid(Obj: Partial<IR8BtnProps> | Partial<IR8BtnPropsFS>): string;
/** Serialize IR8BtnProps to Firestore JSON */
export declare function BtnProps2JSON(Obj: Partial<IR8BtnProps>): IR8BtnPropsFS;
/** Serialize Firestore JSON to IR8BtnProps. json can be undefined */
export declare function JSON2BtnProps(json: Partial<IR8BtnPropsFS> | undefined, target: IR8BtnProps): void;
/** New BtnProps from Firestore JSON */
export declare function JSONAsBtnProps(json?: Partial<IR8BtnPropsFS>): IR8BtnProps;