code: def initialize_unordered_bulk_op(self, bypass_document_validation=False):
          
          warnings.warn("initialize_unordered_bulk_op is deprecated",
                        DeprecationWarning, stacklevel=2)
          return BulkOperationBuilder(self, False, bypass_document_validation)
docs: **DEPRECATED** - Initialize an unordered batch of write operations.
  
          Operations will be performed on the server in arbitrary order,
          possibly in parallel. All operations will be attempted.
  
          :Parameters:
            - `bypass_document_validation`: (optional) If ``True``, allows the
              write to opt-out of document level validation. Default is
              ``False``.
  
          Returns a :class:`~pymongo.bulk.BulkOperationBuilder` instance.
  
          See :ref:`unordered_bulk` for examples.
  
          .. note:: `bypass_document_validation` requires server version
            **>= 3.2**
  
          .. versionchanged:: 3.5
             Deprecated. Use :meth:`~pymongo.collection.Collection.bulk_write`
             instead.
  
          .. versionchanged:: 3.2
             Added bypass_document_validation support
  
          .. versionadded:: 2.7