am 3b519b23: am bd62289a: am 123bcea2: am c2d4a012: am a5913fbb: am a2f11f81: am caec50ec: docs: changed version 5 to 3 for Billing API

* commit '3b519b236186a66ac70f8ebbf6a376a65905cde2':
  docs: changed version 5 to 3 for Billing API