Get the decls of the module.

def c_member_funcs(self, for_struct=False):
        """Get the decls of the module."""
        decls = [
            '{} *{};'.format(self._c_type_name(name), name)
            for name, dummy_args in self.funcs
        ]
        if for_struct:
            return decls
        return [self._c_mod_decl()] + decls