code: def __call__(self, hidden_state):
      cls_token = hidden_state[:, 0]
      out = nn.Dense(hidden_state.shape[-1], name="dense")(cls_token)
      return jax.lax.tanh(out)
  
imports: from typing import Callable, Dict, Tuple
  import flax.linen
  import jax
  import jax.numpy
  import numpy
  from jax.random import PRNGKey
  from modeling_flax_performer_utils import make_fast_softmax_attention
  from transformers.file_utils import add_start_docstrings
  from transformers.modeling_flax_utils import ACT2FN
  from transformers.models.bert.configuration_bert import BertConfig
  from transformers.models.bert.modeling_flax_bert import FlaxBertOnlyMLMHead, FlaxBertPreTrainedModel
  from transformers.utils import logging
label_desc: Use image node_id 1 for calling the FlaxPerformerPooler obj's underlying member method code with example usage: obj.__call__(hidden_state) and returns: jax