internal VariableDomainExpressionEvaluatorContext(VariableDomainExpressionNode theDomainExpression, WorkspaceModel theWorkspace)
 {
     DomainExpression = theDomainExpression;
     Workspace        = theWorkspace;
 }
 internal DomainExpressionEvaluatorContext(VariableDomainExpressionNode theDomainExpression, ModelModel theModel)
 {
     DomainExpression = theDomainExpression;
     Model            = theModel;
 }