RepeaterGroup.addGroups Method
        
 Adds groups to the group.
 
         
        Parameters
        
            - groups
            
 
            - 
                
Type: Array
ElementType: RepeaterGroup
The groups to add. 
            - insertIndex
            
 
            - 
                
Type: Number (Integer)
(optional) An index in the groups array at which to insert the groups. If not specified, the groups will be added to the end.
Optional: True