/**
 * Will print an API deprecation warning message in the console once per session.
 *
 * @param packageName       The package of the API being deprecated, eg `@atlaskit/button`
 * @param api               The API being deprecated - a component, API, prop
 * @param additionalMessage Additional guidance / next steps if applicable
 *
 * @example
 *
 * ```js
 * deprecationWarning('@atlaskit/button', 'className prop', 'This API will stop working in the next major version.')
 * ```
 */
export default function deprecationWarning(packageName: string, api: string, additionalMessage?: string): void;