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import zope.interface
from AccessControl import ClassSecurityInfo
from Products.ERP5Type import Permissions, interfaces
from Products.ERP5.Document.Amount import Amount

class VariationMixin:
  """

    Although MappedValue are supposed to be independent of any
    design choice, we have to implement them as subclasses of
    Amount in order to make sure they provide a complete
    variation interface. In particular, we want to be able
    to call getVariationValue / setVariationValue on a
    MappedValue.
    (XXX - NO MORE)

    XXX - Amount should be remove from here
    
    
    Interesting Idea: properties and categories of the mapped value
    (not of the predicate) could be handled through additional matrix
    dimensions rather than through ad-hoc definition.  
  """

  