code: def load_extra_yaml(self, env, silent, key):
          
          if self.get("YAML") is not None:
              self.logger.warning(
                  "The use of YAML var is deprecated, please define multiple "
                  "filepaths instead: "
                  "e.g: SETTINGS_FILE_FOR_DYNACONF = "
                  "'settings.py,settings.yaml,settings.toml' or "
                  "INCLUDES_FOR_DYNACONF=['path.toml', 'folder/*']"
              )
              yaml_loader.load(
                  self,
                  env=env,
                  filename=self.find_file(self.get("YAML")),
                  silent=silent,
                  key=key,
              )
docs: This is deprecated, kept for compat
  
          .. deprecated:: 1.0.0
              Use multiple settings or INCLUDES_FOR_DYNACONF files instead.