From: Alexandre Terrasa <alexandre@moz-code.org>
Date: Thu, 23 Apr 2015 18:58:11 +0000 (-0400)
Subject: metrics: move `sum` up to interface `Metric`
X-Git-Tag: v0.7.4~8^2~5
X-Git-Url: http://nitlanguage.org?ds=inline;hp=7e8457eff10f664a1ebea2812c110068f5e416a7

metrics: move `sum` up to interface `Metric`

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>
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