export interface GetWithDefault {
    (name: string): string | undefined;
    (name: string, defaultValue: string): string;
}
/**
 * Gets the parameter indicated by the specified name.
 *
 * Parameters can be specified in the `gatling run` command by passing arguments with the format `key=value`, e.g.
 * `gatling run parameter1=foo parameter2=bar`. You would then retrieve them in your simulation by calling
 * `getParameter("parameter1")` and `getParameter("parameter2")`.
 *
 * @param key - the key of the parameter.
 * @param defaultValue - a default value
 * @returns the string value of the parameter if it is defined, or else `defaultValue` if provided, or else `undefined`.
 */
export declare const getParameter: GetWithDefault;
/**
 * @deprecated Use {@link getParameter} instead.
 */
export declare const getOption: GetWithDefault;
/**
 * Gets the environment variable indicated by the specified name.
 *
 * @param name - the name of the environment variable.
 * @param defaultValue - a default value
 * @returns the string value of the environment variable if it is defined, or else `defaultValue` if provided, or else `undefined`.
 */
export declare const getEnvironmentVariable: GetWithDefault;