Table Group class is the collection container object used to access and
create table groups. Like the table class, table group classes are
generated in pairs, a row class, and a collection class.
The naming convention for table group classes is,
T<prefix>TblGrp<message name><group name>
for the collection object, and
T<prefix>TblGrp<message name><group name>Row
for the row object. For example, if you had a table group named "Insurance" in
a message called "Admit" with the prefix "ADT",
the classes generated would be
TADTTblGrpAdmitInsurance and
TADTTblGrpAdmitInsuranceRow.
A really useful diagnostic function for all the Table classes is
the Dump function. This returns a formatted string with
the complete content of the table. It's extremely useful for
debugging.