export declare function isValidNumber(numberString: string): boolean;
export declare function parseNumberString(numberString?: string): string;
export declare function sanitizeDecimalString(decimalString: string): string;
export declare function sanitizeNegativeString(negativeString: string): string;
export declare function sanitizeLeadingZeroString(zeroString: string): string;
export declare function sanitizeNumberString(numberString: string): string;
export declare function sanitizeExponentialNumberString(numberString: string, func: (s: string) => string): string;