code: def is_blank(self, name):
          
          for th in themeable._hierarchy[name]:
              with suppress(KeyError):
                  return self[th].is_blank()
  
          return False
docs: Return True if the themeable *name* is blank
  
          This if the *name* is not in the list of themeables
          then the lookup falls back to inheritance hierarchy
          is considered. If the none of the themeables in the
          hierary are present, ``False`` will be returned.
  
          Parameters
          ----------
          names : str
              Themeable, in order of most specific to most
              general.