Placement of code within Embedded Coder output - at top of model file

Is there a directive in tlc to place the contents of a buffer at the top of the generated model file (after the include section) - similar to the function available through:

Parameters > Code Generation > Custom Code Under the "Source file" selection you can put your custom code, that will generate:

• #include "model.h"
• #include "model_private.h"
• /* user code (top of source file) */
• your custom code
• rest of model generation code

I would like this directive to be in the TLC file instead instead of in the model parameters - but haven't figured out how to insert code outside the specific function bodies (_initialize, _terminate, etc...) within the tlc directives