...
The Src attribute allows you to include functionality from another class in your template by dynamically compiling that class file as part of your template. Set the value of the attribute to point to the source file of the class that you want to include in the template. You use the Src attribute to enable the CodeSmith code-behind model.
Debug
The Debug attribute is used to determine whether or not debug symbols should be included in the generated assembly. Setting this attribute to True will enable you to set break points in your template using the System.Diagnostics.Debugger.Break( ) method.
...