killbill/killbill-client-php — pull request #4 by dlangille (2014-03-06 18:39:09+00:00)
Title: add new class Killbill_InvoiceItem and extend Killbill_Account::get() to allow accountWithBalance and accountWithBalanceAndCBA

Note that ?external_key changes to ?externalKey with this commit.

Not sure if you want htmlentities() invoked on incoming arguments or not.