/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Duplicate action that adds a keyboard shortcut for duplicate and overrides
 * the context menu item to show it if the context menu item is registered.
 */
export declare class DuplicateAction {
    private duplicateShortcut;
    private uninstallHandlers;
    /**
     * Install the shortcuts and override context menu entries.
     *
     * No change is made if there's already a 'duplicate' shortcut.
     */
    install(): void;
    /**
     * Unregister the shortcut and reinstate the original context menu entries.
     */
    uninstall(): void;
    /**
     * Create and register the keyboard shortcut for the duplicate action.
     * Same behaviour as for the core context menu.
     * Skipped if there is a shortcut with a matching name already.
     */
    private registerDuplicateShortcut;
}
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