private bool CanExecuteConfirmGraphAssembleChoice()
 {
     return(GraphAssembleKeys.Contains(GraphAssembleKey) &&
            Constants.GraphParamsValueRanges.Contains(GraphParametres));
 }
 private bool CanExecuteConfirmCreateGraphCommand(object sender)
 {
     return(GraphAssembleKeys.Contains(GraphAssembleKey) &&
            Constants.GraphParamsValueRanges.Contains(GraphParametres));
 }