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/usr/share/idl/thunderbird/nsIPresentationLocalDevice.idl is in thunderbird-dev 1:52.8.0-1~deb8u1.

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/* 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 "nsIPresentationDevice.idl"

/*
 * Local device.
 * This device is used for 1-UA use case. The result for display is rendered by
 * this host device.
 */
[scriptable, uuid(dd239720-cab6-4fb5-9025-cba23f1bbc2d)]
interface nsIPresentationLocalDevice : nsIPresentationDevice
{
  // (1-UA only) The property is used to get the window ID of 1-UA device.
  readonly attribute AUTF8String windowId;
};