A list of parent
method tables, the first of which is the method table for the parent class
for which the method is to be resolved. The SOM API specifies that the list
of parent method tables for a given class be stored in the auxiliary class
data structure of the class, in the parentMtab component. Thus, for
the class "XYZ", the parent method table list is found in location XYZCClassData.parentMtab.
Parent method table lists are available from class objects via the method
call somGetPClsMtabs.