/**
* Removes the specified contact group from the this group's subgroups.
*
* @param subgroup the MockContactGroup subgroup to remove.
*/
public void removeSubGroup(MockContactGroup subgroup) {
this.subGroups.remove(subgroup);
subgroup.setParentGroup(null);
}
/**
* Adds the specified contact group to the contained by this group.
*
* @param subgroup the MockContactGroup to add as a subgroup to this group.
*/
public void addSubgroup(MockContactGroup subgroup) {
this.subGroups.add(subgroup);
subgroup.setParentGroup(this);
}