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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

/**
 * nsIMutable defines an interface to be implemented by objects which
 * can be made immutable.
 */
[scriptable, uuid(321578d0-03c1-4d95-8821-021ac612d18d)]
interface nsIMutable : nsISupports
{
    /**
     * Control whether or not this object can be modified.  If the flag is
     * false, no modification is allowed.  Once the flag has been set to false,
     * it cannot be reset back to true -- attempts to do so throw
     * NS_ERROR_INVALID_ARG.
     */
    attribute boolean mutable;
};