GskDbh * dbh,
This function is for handling hierarchical (tree-like) dependencies
in class creation, such as those which arise from singly-derived object
This function forces the class_create () for a particular class to be
called, while preventing multiple calls to class_create () per program
instance. If class_create () for this type has already been initiated
once this program instance, the return value is supplied to the given
This can be used to chain hierarchical class dependiences in a way that
determines the order of class_create () calls, e.g., derived objects
wanting to safely chain to their parents can call this as the first part
of their implementation of class_create ().
The type of which to force immediate class_create ().
The database handle associated with the persistent store.
Callback to execute when finished.
Additional data passed through unmodified.