BridgeParameterDialogViewModel Constructor
        
 Initialize a Bridge Parameter view model.
 
         
        Parameters
        
            - parameter
            
 
            - 
                
Type: dundas.data.BridgeParameter
The bridge parameter to initialize the view model with. 
            - existingParameters
            
 
            - 
                
Type: Array
ElementType: dundas.data.Parameter
The parameters available to bridge to.