code: def _listchecks(_):
      
      import glerbl.check
      package = glerbl.check
      for _, modname, _ in pkgutil.walk_packages(path=package.__path__):
          mod = importlib.import_module(package.__name__+ '.' + modname)
          print(modname, mod.Check.hooks)
          print(mod.Check.__doc__)
docs: Outputs to stdout the list of checks that glerbl knows about. The
      format of the list is::
  
          module_name [list of hooks]
  
             docstring
  
      The identifier ``module_name`` is the name of the module
      implementing the check. This name is how you'd refer to the check
      in your ``glerbl.conf.py`` file. The ``[list of hooks]`` is a list
      of hook name to which this check can be applied. The ``docstring``
      is a description of what the hook does.