/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
import type { Plugin } from 'postcss';
/**
 * This PostCSS plugin will remove duplicate/same custom properties (which are
 * actually overridden ones) **only** from `:root` selector.
 *
 * Depending on the presence of an `!important` rule in value of custom
 * property, the following actions will happen:
 *
 * - If the same custom properties do **not** have an `!important` rule, then
 * all of them will be removed except for the last one (which will actually be
 * applied).
 * - If the same custom properties have at least one `!important` rule, then
 * only those properties that do not have this rule will be removed.
 */
declare function creator(): Plugin;
declare namespace creator {
    var postcss: true;
}
export default creator;