From 0b7fd741388812a9357cf66761105da0e60ad53f Mon Sep 17 00:00:00 2001
From: Tong He <hetong007@gmail.com>
Date: Thu, 27 Sep 2018 17:53:49 -0700
Subject: [PATCH] fix R check warning (#3728)

---
 R-package/demo/00Index | 1 +
 1 file changed, 1 insertion(+)

diff --git a/R-package/demo/00Index b/R-package/demo/00Index
index e1955f7f0..5c949d0a7 100644
--- a/R-package/demo/00Index
+++ b/R-package/demo/00Index
@@ -11,4 +11,5 @@ early_stopping                  Early Stop in training
 poisson_regression              Poisson Regression on count data
 tweedie_regression              Tweddie Regression
 gpu_accelerated                 GPU-accelerated tree building algorithms
+interaction_constraints         Interaction constraints among features