import { SimpleAppConfigError } from './simpleAppConfigError';
/**
 * An error extending {@link SimpleAppConfigError} that should be thrown when attempting to access a value from a configuration
 * file when the value is undefined.
 */
export declare class UndefinedConfigValueError extends SimpleAppConfigError {
    /**
     * Constructor for {@link UndefinedConfigValueError}.
     * @param key The configuration value that is undefined.
     */
    constructor(key: string);
}