public virtual object VisitCompilationUnit(CompilationUnit compilationUnit, object data) {
			Debug.Assert((compilationUnit != null));
			return compilationUnit.AcceptChildren(this, data);
		}
		public override object VisitCompilationUnit(CompilationUnit compilationUnit, object data)
		{
			if (compilationUnit == null) {
				throw new ArgumentNullException("compilationUnit");
			}
			CodeNamespace globalNamespace = new CodeNamespace("Global");
			//namespaces.Add(globalNamespace);
			namespaceDeclarations.Push(globalNamespace);
			compilationUnit.AcceptChildren(this, data);
			codeCompileUnit.Namespaces.Add(globalNamespace);
			return globalNamespace;
		}