def write_module_code(self, module_code):
        """write module-level template code, i.e. that which
        is enclosed in <%! %> tags in the template."""
        for n in module_code:
            self.printer.start_source(n.lineno)
            self.printer.write_indented_block(n.text)
write module-level template code, i.e. that which
        is enclosed in <%! %> tags in the template.