          return Resource(self)
  
      def validate_request(self, data, files):
          """
          Given the request *data* return the cleaned, validated content.
          Typically raises an :class:`response.ErrorResponse` with status code 400 (Bad Request) on failure.
          """
          return self._resource.validate_request(data, files)
  
      def filter_response(self, obj):
          """
 
</s> remove     def validate_request(self, data, files):
 </s> add     def validate_request(self, data, files=None): </s> remove     def validate_request(self, data, files):
 </s> add     def validate_request(self, data, files=None): </s> remove     def validate_request(self, data, files):
 </s> add     def validate_request(self, data, files=None): </s> remove     def validate_request(self, data, files):
 </s> add     def validate_request(self, data, files=None):
        Given the request *data* and optional *files*, return the cleaned, validated content.
        May raise an :class:`response.ErrorResponse` with status code 400 (Bad Request) on failure.
          return Resource(self)
  
      def validate_request(self, data, files):
          """
        Given the request *data* and optional *files*, return the cleaned, validated content.
        May raise an :class:`response.ErrorResponse` with status code 400 (Bad Request) on failure.
        Given the request *data* and optional *files*, return the cleaned, validated content.
        May raise an :class:`response.ErrorResponse` with status code 400 (Bad Request) on failure.
          """
          return self._resource.validate_request(data, files)
  
      def filter_response(self, obj):
          """
keep keep keep keep replace replace keep keep keep keep keep
 Allow .form specified on view.  Allow get_form, put_form, post_form.  Add .PARAMS. 
djangorestframework/mixins.py