message: [tf.data] Add the `kBufferSizeMin` to .cc file to solve some bug.
diff: @@ -45,6 +45,7 @@ namespace data {
  /* static */ constexpr const char* const PrefetchDatasetOp::kOutputShapes;
  /* static */ constexpr const char* const PrefetchDatasetOp::kSlackPeriod;
  /* static */ constexpr const char* const PrefetchDatasetOp::kLegacyAutotune;
  +/* static */ constexpr const char* const PrefetchDatasetOp::kBufferSizeMin;
  // Determines the fraction of slack time by which to delay prefetching of data.
  constexpr double kSleepFactor = 0.2;
  