code: def _set_supported_content_type(self, content_types_supported):
          
          if not isinstance(content_types_supported, list):
              raise TypeError(("Settings 'READTIME_CONTENT_SUPPORT' must be"
                               "a list of content types."))
  
          self.content_type_supported = content_types_supported
docs: Checks and sets the supported content types configuration value.