Method dropout

tensorflow/core/kernels/cudnn_rnn_ops.cc:1003–1003

  }
  const CudnnModelTypes& model_types() const { return model_types_; }
  float dropout() const { return dropout_; }
  uint64 seed() { return (static_cast<uint64>(seed_) << 32) | seed2_; }
  bool ResetRndGenState() { return reset_rnd_gen_state_; }