function to resize a UML class object's extent?

["Andrew S . Halper" <ashalper acm org>]

Anyone know which function I should call (or property to set) to resize a class
object's borders around the text inside?  I took a look at umlclass_create() in
objects/UML/class.c, but I didn't see anything obvious.

My problem is I'm creating UML class objects on a diagram, and most of the time
the string in the class name is too big for the default extent of the class box,
so it winds up looking like:

     +-------+
A_lon|g_class|_name
     +-------+

and generally leaves a mess when the object is dragged around the diagram.

I'm doing all this from a plug-in.

Thanks,
Andy