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   Copyright (c) 2016 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
  
   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
  
  Copyright (c) 2016 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
  
  Copyright (c) 2017 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
  */
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