code: def render_parse_load(raw_config, environment=None, validate=True):
      
  
      pre_rendered = render(raw_config, environment)
  
      rendered = process_remote_sources(pre_rendered, environment)
  
      config = parse(rendered)
  
      # For backwards compatibility, if the config doesn't specify a namespace,
      # we fall back to fetching it from the environment, if provided.
      if config.namespace is None:
          namespace = environment.get("namespace")
          if namespace:
              logger.warn("DEPRECATION WARNING: specifying namespace in the "
                          "environment is deprecated. See "
                          "https://stacker.readthedocs.io/en/latest/config.html"
                          "#namespace "
                          "for more info.")
              config.namespace = namespace
  
      if validate:
          config.validate()
  
      return load(config)
docs: Encapsulates the render -> parse -> validate -> load process.
  
      Args:
          raw_config (str): the raw stacker configuration string.
          environment (dict, optional): any environment values that should be
              passed to the config
          validate (bool): if provided, the config is validated before being
              loaded.
  
      Returns:
          :class:`Config`: the parsed stacker config.