Shell | grep with n following lines

grep -A  'foo' sample.txt

➜  dex-method-counts git:(master) ./dex-method-counts ~/Downloads/n.apk | grep -A  'hui'
            hui:
                agent:
                complain:
                detail:
                list:
                pay:
                rules:
                util:
            loader:
                model:
            locationservice: