code: private void applyOp(SchemaOperation op, ZooClassDef def) {
  		ops.add(op);
  		for (GenericObject o: cache.getAllGenericObjects()) {
  			if (o.jdoZooGetClassDef() == def) {
  				o.evolve(op);
  			}
  		}
  	}
docs: Apply an operation to all objects in the cache.
  @param op
  @param def