From ee634c2a2860860efd1fa38949a592806399e561 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Tue, 7 Mar 2017 17:43:13 +0100
Subject: [PATCH] clarify doc

---
 interface.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/interface.go b/interface.go
index a61c247..d4fe55f 100644
--- a/interface.go
+++ b/interface.go
@@ -107,6 +107,8 @@ type Picture interface {
 	Bounds() Rect
 
 	// Slice returns a sub-Picture with specified Bounds.
+	//
+	// A result Slice-ing outside the original Bounds is unspecified.
 	Slice(Rect) Picture
 
 	// Original returns the most original Picture (may be itself) that this Picture was created
-- 
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