code: def load_config_vars(target_config, source_config):
      
      # Overwrite all attributes in config with new config
      for attr in dir(source_config):
          # skip all private class attrs
          if attr.startswith('_'):
              continue
          val = getattr(source_config, attr)
          if val is not None:
              setattr(target_config, attr, val)
docs: Loads all attributes from source config into target config
  
      @type target_config: TestRunConfigManager
      @param target_config: Config to dump variables into
      @type source_config: TestRunConfigManager
      @param source_config: The other config
      @return: True