text: # This file is dual licensed under the terms of the Apache License, Version
  # 2.0, and the BSD License. See the LICENSE file in the root of this repository
  # for complete details.
  
  from __future__ import absolute_import, division, print_function
  
  
  _default_backend = None
  
  
  def default_backend():
      global _default_backend
  
      if _default_backend is None:
          from cryptography.hazmat.backends.openssl.backend import backend
          _default_backend = backend
  
      return _default_backend
  