public Stella_Object thirdSetter(Stella_Object value) {
    { Cons self = this;

      { Cons thirdcons = self.rest.rest;

        if (!(thirdcons == Stella.NIL)) {
          return (thirdcons.value = value);
        }
        else {
          {
            Stella.STANDARD_WARNING.nativeStream.println("Warning: 'third setter' applied to too short cons list.");
            return (null);
          }
        }
      }
    }
  }