code: def unders_to_dashes_in_keys(self) -> None:
          
          for key_node, _ in self.yaml_node.value:
              key_node.value = key_node.value.replace('_', '-')
docs: Replaces underscores with dashes in key names.
  
          For each attribute in a mapping, this replaces any underscores \
          in its keys with dashes. Handy because Python does not \
          accept dashes in identifiers, while some YAML-based formats use \
          dashes in their keys.