code: def _ParseNamesString(self, names_string):
      
      if not names_string:
        return
  
      names_string = names_string.lower()
      names = [name.strip() for name in names_string.split(',')]
      file_entry_filter = file_entry_filters.NamesFileEntryFilter(names)
      self._filter_collection.AddFilter(file_entry_filter)
docs: Parses the name string.
  
      Args:
        names_string (str): comma separated filenames to filter.