/**
 * 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.
 */
/**
 * This method splits "⚠️ Hello World" into "⚠️" + " Hello World".
 * It is quite strict and dumb, only useful to handle best-effort heuristics.
 * It only extracts a leading emoji if it is the first grapheme of the string.
 * It only extracts one emoji, even if multiples are present.
 * It doesn't trim the remaining string.
 * If you need something more clever, it should be built on top.
 * @param input
 */
export declare function extractLeadingEmoji(input: string): {
    emoji: string | null;
    rest: string;
};
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