export declare class Check {
    /**
     * Ensures that the specified condition for an argument is true.
     * @param condition the condition.
     * @param message a description of the condition.
     * @throws IllegalArgumentError if the condition is false.
     */
    static argument(condition: boolean, message: string): void;
    /**
     * Ensures that the specified condition of state is true.
     * @param condition the condition.
     * @param message a description of the condition.
     * @throws IllegalStateError if the condition is false.
     */
    static state(condition: boolean, message: string): void;
    /**
     * Ensures that the specified zero-based index is in bounds.
     * @param n the smallest positive number that is not in bounds.
     * @param i the index.
     * @throws IndexOutOfBoundsError if index is out of bounds
     */
    static index(n: number, i: number): void;
}