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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_default_retry_params():
 """Get default RetryParams for current request and current thread. Returns: A new instance of the default RetryParams. """

  default = getattr(_thread_local_settings, 'default_retry_params', None)
  if default is None or not default.belong_to_current_request():
    return RetryParams()
  else:
    return copy.copy(default)