Move IsSetEqual into array_check_detail namespace
Move IsSetEqual into array_check_detail namespace

jnishi/chainer,niboshi/chainer,jnishi/chainer,chainer/chainer,pfnet/chainer,niboshi/chainer,wkentaro/chainer,okuta/chainer,wkentaro/chainer,chainer/chainer,hvy/chainer,ktnyt/chainer,okuta/chainer,jnishi/chainer,ktnyt/chainer,keisuke-umezawa/chainer,okuta/chainer,niboshi/chainer,ktnyt/chainer,okuta/chainer,keisuke-umezawa/chainer,ktnyt/chainer,keisuke-umezawa/chainer,tkerola/chainer,wkentaro/chainer,keisuke-umezawa/chainer,chainer/chainer,hvy/chainer,wkentaro/chainer,niboshi/chainer,chainer/chainer,jnishi/chainer,hvy/chainer,hvy/chainer