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Commander pattern #505 (#857)

* Commander pattern

* Fix checkstyle errors

* Update Commander.java

* Update README.md

* Update PaymentService.java

* Update Commander.java

* Update README.md
A
AnaghaSasikumar committed
d9a567cf970748ea8109ef99013393f88821ff05
Parent: a113de6
Committed by Ilkka Seppälä <iluwatar@users.noreply.github.com> on 7/29/2019, 6:09:08 PM