code: def update(self, module_name=None):
          
          if not module_name:
              return self._module.force_update()
          else:
              module_info = self._get_module_info(module_name)
              if module_info:
                  module_info["module"].force_update()
docs: Update a module.  If module_name is supplied the module of that
          name is updated.  Otherwise the module calling is updated.