/**
 * 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.
 */
/** Adds a given string prefix to `str`. */
export declare function addPrefix(str: string, prefix: string): string;
/** Removes a given string suffix from `str`. */
export declare function removeSuffix(str: string, suffix: string): string;
/** Adds a given string suffix to `str`. */
export declare function addSuffix(str: string, suffix: string): string;
/** Removes a given string prefix from `str`. */
export declare function removePrefix(str: string, prefix: string): string;
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