As first parameter, an object wrapping the input amount (by acquisition)
is passed instead of the amount itself.
The purpose of this object is to provide additional information about current
amount generation. It has 2 public methods:
- getGeneratedAmountQuantity
- getBaseAmountList

git-svn-id: https://svn.erp5.org/repos/public/erp5/sandbox/amount_generator@39101 20353a03-c40f-0410-a6d1-a30d3c3de9de