code: def _copy_old_configs(self, user, default):
          
          DEPRECATED_SUMMERNOTE_CONFIGS = (
              'width',
              'height',
              'lang',
              'toolbar',
          )
          for key in DEPRECATED_SUMMERNOTE_CONFIGS:
              if user.get(key):
                  self.config['summernote'][key] = user.get(key)
              if not self.config['summernote'].get(key):
                  self.config['summernote'][key] = default['summernote'].get(key)
docs: NOTE: Will be deprecated from 0.9
          Copying old-style settings for backword-compatibility