anchor.diff:       -H "Content-Type: application/json" \
        -H "X-Killbill-CreatedBy: demo" \
        -X POST \
  -     "http://127.0.0.1:8080/1.0/kb/invoices/dryRun?accountId=0c9548f0-3c8f-41e8-abe2-966510076daf&targetDate=2014-12-21"
  +     "http://127.0.0.1:8080/1.0/kb/invoices/dryRun?accountId=<ACCOUNT_ID>&targetDate=2014-12-21"
   ----
   
   === Premium feature example: applying 10% discount at checkout
  
positive.code:      -H "X-Killbill-ApiKey: bob" \
       -H "X-Killbill-ApiSecret: lazar" \
       -H "Content-Type: application/json" \
       "http://127.0.0.1:8080/1.0/kb/accounts/0c9548f0-3c8f-41e8-abe2-966510076daf/payments"
  ----
  
  Kill Bill will now automatically charge the user on a monthly basis. You can estimate the amount which will be billed at a future date (replace the targetDate parameter with a date in the future):
  
negative.code:      -H "X-Killbill-ApiKey: bob" \
       -H "X-Killbill-ApiSecret: lazar" \
       -H "Content-Type: application/json" \
       "http://127.0.0.1:8080/1.0/kb/accounts/<ACCOUNT_ID</bundles"
  ----
  
  The subscription list will show the cancellation status: cancelledDate. If it's null or in the future, the subscriber is still a paying customer, in which case you can apply the 10% discount.
  