docs: def _get_stack(self, orchestration_client, stack_name):
          """Get the ID for the current deployed overcloud stack if it exists."""
  
          try:
              stack = orchestration_client.stacks.get(stack_name)
              self.log.info("Stack found, will be doing a stack update")
              return stack
          except HTTPNotFound:
              self.log.info("No stack found, will be doing a stack create")