PUBLIC:
Configure the mapping to use an instance of the specified container class
to hold the target objects. The key used to index a value in the
Map
is the value returned by a call to the specified
zero-argument method.
The method must be implemented by the class (or a superclass) of any
value to be inserted into the Map
.
The container class must implement (directly or indirectly) the
java.util.Map
interface.
To facilitate resolving the method, the mapping's referenceClass
must set before calling this method.