Recursively aggregates like hierarchical array attributes
into a single container attribute according to user-specified criteria
and the list of attributes to be summed up.
Specifies the aggregation level, which comprises the type
of the business object (its business object definition) and the
name of the array attribute to aggregate. Names are delimited by
a period (.).
KeyAttr
Specifies the key attributes of the business object used for
aggregation.
Attr
Specifies the attributes to be aggregated. Multiple names
are delimited by a comma (,).
Return values
Returns the aggregated business object.
Exceptions
CollaborationException--Thrown if an error occurs during
aggregation of the business object attributes.