The argument of OnBarClickedLister.onClick is wrong.

[waura]

The argument of OnBarClickedLister.onClick was wrong, when I clicked BarGraph on HoloGraphLibrarySample.

if I click Test1 Graph, index value is '0'.
if I click Test2 Graph, index value is '-1'.
if I click Test3 Graph, index value is '-1'.

I think pattern of Test2 and Test3 Graph is wrong.
if I click Test2 Graph, index value should be '1'.
if I click Test3 Graph, index value should be '2'.