docs: def get_class(name, config_key, module):
      """Get the class by its name as a string."""
      clsmembers = inspect.getmembers(module, inspect.isclass)
      for string_name, act_class in clsmembers:
          if string_name == name:
              return act_class
  
      # Check if the user has specified a plugin and if the class is in there
      cfg = get_project_configuration()
      if config_key in cfg:
          modname = os.path.splitext(os.path.basename(cfg[config_key]))[0]
          if os.path.isfile(cfg[config_key]):
              usermodule = imp.load_source(modname, cfg[config_key])
              clsmembers = inspect.getmembers(usermodule, inspect.isclass)
              for string_name, act_class in clsmembers:
                  if string_name == name:
                      return act_class
          else:
              logging.warning("File '%s' does not exist. Adjust ~/.hwrtrc.",
                              cfg['data_analyzation_plugins'])
  
      logging.debug("Unknown class '%s'.", name)
      return None