*   Use the free functions such as
            `tensorflow::errors::IsInvalidArgument` if needed.
        *   In the last resort, use
            e.g.`static_cast<tensorflow::errors::Code>(error::Code::INVALID_ARGUMENT)`
            or `static_cast<int>(code)` for comparisons.
*   `tensorflow::StatusOr` will also become in the future an alias to
    `absl::StatusOr`, so use `StatusOr::value` instead of

261A..266F    ; valid                  ;      ; NV8    # 1.1  BLACK LEFT POINTING INDEX..MUSIC SHARP SIGN
2670..2671    ; valid                  ;      ; NV8    # 3.0  WEST SYRIAC CROSS..EAST SYRIAC CROSS
2672..267D    ; valid                  ;      ; NV8    # 3.2  UNIVERSAL RECYCLING SYMBOL..PARTIALLY-RECYCLED PAPER SYMBOL