Licensed under the Apache License, Version 2.0 (the "License");

Copyright (c) 2016 Modesty Zhang. (@modestyqz)

You may not use this work except in compliance with the License:
http://www.apache.org/licenses/LICENSE-2.0.

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License at http://www.apache.org/licenses/LICENSE-2.0 for the
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