docs: def check_developer(self) -> bool:
          """
          Check if a given developer exists in the rumetr database
          """
          if self._last_checked_developer == self.developer:
              return True
  
          try:
              self.get('developers/%s/' % self.developer)
          except exceptions.Rumetr404Exception:
              raise exceptions.RumetrDeveloperNotFound('Bad developer id — rumetr server does not know it. Is it correct?')
  
          self._last_checked_developer = self.developer
          return True