docs: def create_spot_nodes(self):
          """Create spot nodes.
          """
          self.create_stack(
              self.spot_nodes_name,
              'amazon-spot-nodes.yaml',
              parameters=define_parameters(
                  ClusterName=self.cluster_name,
                  Subnets=self.subnet_ids,
                  NodeInstanceProfile=self.node_instance_profile,
                  NodeInstanceRole=self.node_instance_role,
                  NodeSecurityGroup=self.node_security_group,
  
              )
          )