Method AsOptional

common/value.h:902–904

      const& ABSL_ATTRIBUTE_LIFETIME_BOUND;
  absl::optional<OptionalValue> AsOptional() &&;
  absl::optional<OptionalValue> AsOptional() const&& {
    return common_internal::AsOptional(AsOptional());
  }

  // Performs a checked cast from a value to a parsed JSON list value,
  // returning a non-empty optional with either a value or reference to the