IVARS - List of names of instance variables.
CVARS - List of names of class variables.
CVAL - Array of class variable values.
SUPERCLASS - The superclass of this class or NIL if no superclass (only for class OBJECT).
IVARCNT - instance variables in this class (length of IVARS)
IVARTOTAL - total instance variables for this class and all superclasses of this class.
PNAME - printname string for this class.