/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict
 */

/**
 * Convert font sizes from absolute unit `px` to relative unit `rem`.
 * This will allow developers to continue thinking and using what's familiar
 * while we output font sizes that are adjustable
 */
declare export default function convertFontSizeToRem(
  ast: PostCSSValueAST,
  key: string,
): PostCSSValueAST;