optimizer.
    *   **Learning rate schedule access.** When using a `LearningRateSchedule`,
        The new optimizer's `learning_rate` property returns the
        current learning rate value instead of a `LearningRateSchedule` object
        as before. If you need to access the `LearningRateSchedule` object,
        please use `optimizer._learning_rate`.

269E..269F    ; valid                  ;      ; NV8    # 5.2  THREE LINES CONVERGING RIGHT..THREE LINES CONVERGING LEFT
26A0..26A1    ; valid                  ;      ; NV8    # 4.0  WARNING SIGN..HIGH VOLTAGE SIGN
26A2..26B1    ; valid                  ;      ; NV8    # 4.1  DOUBLED FEMALE SIGN..FUNERAL URN
26B2          ; valid                  ;      ; NV8    # 5.0  NEUTER