class_docstr: A simple bi-directional LSTM.
code: def setup(self):
      self.forward_lstm = SimpleLSTM(self.hidden_size)
      self.backward_lstm = SimpleLSTM(self.hidden_size)
  
imports: import functools
  from typing import Any, Callable, Optional
  from flax import linen
  import jax
  from jax import numpy
label_desc: Use image node_id 1 for calling the SimpleBiLSTM obj's underlying member method code with example usage: obj.setup() without return types