No substantial code change. Note that some style errors reported by `golint` are not fixed due to possible compatibility issues. Signed-off-by: Akihiro Suda <suda.kyoto@gmail.com>
Signed-off-by: xlgao-zju <xlgao@zju.edu.cn>
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>