An interface defining the contract for interaction with
the JwmaContactGroup model.
The JwmaContactGroup allows a view programmer to obtain
information about the contact group to display
items for reading or editing.
author: Dieter Wimberger version: 0.9.7 07/02/2003
Returns an array of contacts containing all contacts
in this contact group.
If this contact group does not contain any contacts,
then this method returns an empty array.
Otherwise it contains one JwmaContact for
each entry in this contact group.
an array of JwmaContact's.