:sig
void unit_render(String file_name)
void unit_render(String file_name, Request& context)

:params
file_name : UCE file to load and execute
context : optional request context to pass into the target page

:desc
Calls another UCE file and executes its `RENDER(Request& context)` function.

If `context` is omitted, the current active request context is used.

:Example
// call a common page template
unit_render("page-template.uce");

// explicitly pass a request context
unit_render("page-template.uce", context);

:see
>ob