docs: def getid(self, idtype):
          '''
          idtype in Uniq constants
          '''
          memorable_id = None
          while memorable_id in self._ids:
              l=[]
              for _ in range(4):
                  l.append(str(randint(0, 19)))
              memorable_id = ''.join(l)
          self._ids.append(memorable_id)
          return idtype + '-' + memorable_id