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ref: a765197b73a7b58c1d2a2bbce135fd1b9bf9deab parent: d720122a3765ad881575c73def3492b2022c8c01 author: Sijia Chen <sijchen@cisco.com> date: Wed Oct 22 07:35:17 EDT 2014
add interface and basic implementaion and UT for EncoderStatistics