export declare function useURLRequiredInvariant(condition: boolean, method: string): void;
export declare const useExampleURL: () => string;
/**
 * Determines if the given param is an object. {}
 * @param obj
 */
export declare const isObject: (obj: any) => boolean;
/**
 * Used for error checking. If the condition is false, throw an error
 */
export declare function invariant(condition: boolean, format: string, a?: string, b?: string, c?: string, d?: string, e?: string, f?: string): void;