ConnectorElementPlaceholderDialogViewModel Constructor
        
 Initialize a Connector Element Placeholder view model.
 
         
        Parameters
        
            - placeholder
            
 
            - 
                
Type: dundas.data.Placeholder
The transform placeholder to initialize the view model with. 
            - inputs
            
 
            - 
                
Type: Array
ElementType: dundas.data.TransformConnector
The input connectors which contain elements to create placeholders for.