old_contents: from bootstrap_test import BaseBootstrapTest
  from tools import since, no_vnodes
  
  
  class TestBootstrapUpgrade(BaseBootstrapTest):
      __test__ = True
  
      """
      @jira_ticket CASSANDRA-11841
      Test that bootstrap works with a mixed version cluster
      In particular, we want to test that keep-alive is not sent
      to a node with version < 3.10
      """
      @no_vnodes()
      @since('3.10', max_version='3.99')
      def simple_bootstrap_test_mixed_versions(self):
          self._base_bootstrap_test(bootstrap_from_version="3.5")
  
new_contents: from bootstrap_test import BaseBootstrapTest
  from tools.decorators import since, no_vnodes
  
  
  class TestBootstrapUpgrade(BaseBootstrapTest):
      __test__ = True
  
      """
      @jira_ticket CASSANDRA-11841
      Test that bootstrap works with a mixed version cluster
      In particular, we want to test that keep-alive is not sent
      to a node with version < 3.10
      """
      @no_vnodes()
      @since('3.10', max_version='3.99')
      def simple_bootstrap_test_mixed_versions(self):
          self._base_bootstrap_test(bootstrap_from_version="3.5")
  
subject: change imports for new module structure (#1300)