export interface RequiredOptionValue {
    value: string;
    nextIndex: number;
}
export declare function readRequiredOptionValue(args: string[], index: number, optionName: string, valueLabel: string): RequiredOptionValue;
export declare function readRequiredOptionValueOrExit(args: string[], index: number, optionName: string, valueLabel: string): RequiredOptionValue;
export declare function failUnknownCliArgument(arg: string, printHelp: () => void): never;