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/**
 * @license
 * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 */
// @version 0.7.24
"undefined"==typeof WeakMap&&!function(){var e=Object.defineProperty,t=Date.now()%1e9,r=function(){this.name="__st"+(1e9*Math.random()>>>0)+(t++ +"__")};r.prototype={set:function(t,r){var i=t[this.name];return i&&i[0]===t?i[1]=r:e(t,this.name,{value:[t,r],writable:!0}),this},get:function(e){var t;return(t=e[this.name])&&t[0]===e?t[1]:void 0},"delete":function(e){var t=e[this.name];return!(!t||t[0]!==e)&&(t[0]=t[1]=void 0,!0)},has:function(e){var t=e[this.name];return!!t&&t[0]===e}},window.WeakMap=r}(),function(e){function t(e){N.push(e),O||(O=!0,b(i))}function r(e){return window.ShadowDOMPolyfill&&window.ShadowDOMPolyfill.wrapIfNeeded(e)||e}function i(){O=!1;var e=N;N=[],e.sort(function(e,t){return e.uid_-t.uid_});var t=!1;e.forEach(function(e){var r=e.takeRecords();n(e),r.length&&(e.callback_(r,e),t=!0)}),t&&i()}function n(e){e.nodes_.forEach(function(t){var r=p.get(t);r&&r.forEach(function(t){t.observer===e&&t.removeTransientObservers()})})}function a(e,t){for(var r=e;r;r=r.parentNode){var i=p.get(r);if(i)for(var n=0;n0){var n=r[i-1],a=l(n,e);if(a)return void(r[i-1]=a)}else t(this.observer);r[i]=e},addListeners:function(){this.addListeners_(this.target)},addListeners_:function(e){var t=this.options;t.attributes&&e.addEventListener("DOMAttrModified",this,!0),t.characterData&&e.addEventListener("DOMCharacterDataModified",this,!0),t.childList&&e.addEventListener("DOMNodeInserted",this,!0),(t.childList||t.subtree)&&e.addEventListener("DOMNodeRemoved",this,!0)},removeListeners:function(){this.removeListeners_(this.target)},removeListeners_:function(e){var t=this.options;t.attributes&&e.removeEventListener("DOMAttrModified",this,!0),t.characterData&&e.removeEventListener("DOMCharacterDataModified",this,!0),t.childList&&e.removeEventListener("DOMNodeInserted",this,!0),(t.childList||t.subtree)&&e.removeEventListener("DOMNodeRemoved",this,!0)},addTransientObserver:function(e){if(e!==this.target){this.addListeners_(e),this.transientObservedNodes.push(e);var t=p.get(e);t||p.set(e,t=[]),t.push(this)}},removeTransientObservers:function(){var e=this.transientObservedNodes;this.transientObservedNodes=[],e.forEach(function(e){this.removeListeners_(e);for(var t=p.get(e),r=0;r