code: def default_state(self, *batch_shape, device=None):
      # kernel is not a SequenceModule so it doesn't need to adhere to same interface
      # the kernel will know the device of its own parameters
      return self.kernel.default_state(*batch_shape)
  
imports: import logging
  import math
  import os
  from functools import wraps
  from typing import Any, Callable, Optional
  import numpy
  import opt_einsum
  import torch
  import torch.nn
  import torch.nn.functional
  from einops import rearrange, repeat
  from espnet2.asr.state_spaces.components import Activation, DropoutNd, LinearActivation
label_desc: Use image node_id 5 for calling the S4 obj's underlying member method code with example usage: obj.default_state() and returns: self