MixinRefactoring.CompositeCommand.Execute C# (CSharp) Method

        public ClassDeclarationSyntax Execute(
            ClassDeclarationSyntax childDeclaration, 
            SemanticModel semantic, 
            Settings settings = null)
        {
            // we need the class name of the child to find it in the syntax tree
            // after it was changed
            var childClassName = childDeclaration.Identifier.Text.ToString();
            foreach (var command in _commands)
            {
                var oldSyntaxTree = childDeclaration.SyntaxTree;
                var newChildDeclaration = command.Execute(childDeclaration, semantic, settings);
                // replace the old class declaration with the new one in the syntax tree
                var newRoot = semantic.SyntaxTree.GetRoot().ReplaceNode(childDeclaration, newChildDeclaration);
                var newSyntaxTree = newRoot.SyntaxTree;
                var compilation = semantic.Compilation.ReplaceSyntaxTree(oldSyntaxTree,newSyntaxTree);
                // after creating the new syntax tree, get a new semantic model
                semantic = compilation.GetSemanticModel(newSyntaxTree);
                // also retrieve the class declaration from the new syntax tree
                childDeclaration = newRoot.FindClassByName(childClassName);
            }
            return childDeclaration;
        }
    }