/**
 * Pass ref down to a child. This is mainly used in libraries with HOCs that
 * wrap components. Using `forwardRef` there is an easy way to get a reference
 * of the wrapped component instead of one of the wrapper itself.
 * @param {import('./index').ForwardFn} fn
 * @returns {import('./internal').FunctionalComponent}
 */
export function forwardRef(fn: import('./index').ForwardFn): import('./internal').FunctionalComponent;