MetricSetService.addCustomHierarchyGroup Method
        
 Adds a custom hierarchy group to a hierarchy on a metric set.
 
         
        Parameters
        
            - metricSetId
            
 
            - 
                
Type: String
The ID of the metric set to add the custom hierarchy group to. 
            - hierarchyUniqueName
            
 
            - 
                
Type: String
The unique name of the hierarchy that the hierarchy group is for. 
            - caption
            
 
            - 
                
Type: String
The caption of the new hierarchy group. 
            - memberUniqueNames
            
 
            - 
                
Type: Array
ElementType: String
The unique names of the members to make up the group. 
        
        Return Value
        
Type: jQuery.Promise
        
Value: dundas.entities.MetricSet
        
A promise object that is resolved when the call is complete.
 If successful, the updated dundas.entities.MetricSet is returned.