          # Set from Samples
          self.update_source = False
          self.source = list()  # Source images, filenames + detected faces
          # Set from Patch
          self.destination = list()  # Swapped + patched images
  
          logger.trace("Initialized %s", self.__class__.__name__)
  
      @property
      def tk_image(self):
 
</s> remove         self.source = list()  # Source images, filenames + detected faces
 </s> add         self.source = []  # Source images, filenames + detected faces </s> remove         swapped = list()
 </s> add         swapped = [] </s> remove         self._faces["dst"] = list()
 </s> add         self._faces["dst"] = [] </s> remove         self.tk_vars = dict()
 </s> add         self.tk_vars = {} </s> remove                     new_opt = options.value  # Keep saved item for other sections
 </s> add                     # retain saved values that have not been updated
                    new_opt = self._config.get(config_section, item)
        self.destination = []  # Swapped + patched images
          # Set from Samples
          self.update_source = False
          self.source = list()  # Source images, filenames + detected faces
          # Set from Patch
        self.destination = []  # Swapped + patched images
  
          logger.trace("Initialized %s", self.__class__.__name__)
  
      @property
      def tk_image(self):
keep keep keep keep replace keep keep keep keep keep
 bugfix: Preview Tool, ensure all config items are written 
tools/preview/preview.py