Function set_unique_objects:
Defined in module container (file: /std/container.c)

Provide a list of objects to be loaded now and at every reset if they
are not already loaded.  The key should be the filename of the object, 
and the value should be an array which is passed to create() when the 
objects are cloned.
The structure of the mapping should be the same as the structure of the 
mapping for set_objects().  For unique objects, to be checked, you should
have a function in the object called test_unique() which will return 1 if 
uniqueness requirements are met.  The prototype for the function is
        int test_unique();
An optional second string argument represents a specific relation which
should produce objects on reset()

Prototype:
varargs mixed array set_unique_objects(mapping m,string relation);
