code: def feed_shape_type_def(self):
      TS = tf.TensorShape
      return (
          (
              {
                  "tokens": tf.int32,
              },
              (tf.int32, tf.int32),
          ),
          (
              {
                  "tokens": TS([None]),
              },
              (TS([None]), TS([])),
          ),
      )
  
imports: import functools
  import numpy
  import tensorflow
  from finetune.base import BaseModel
  from finetune.encoding.target_encoders import Seq2SeqLabelEncoder
  from finetune.input_pipeline import BasePipeline
  from finetune.model import PredictMode
  from finetune.util.beam_search import beam_search, get_state_shape_invariants
  from tensorflow.python.util import nest
  import itertools
  import sys
label_desc: Use image node_id 2 for calling the S2SPipeline obj's underlying member method code with example usage: obj.feed_shape_type_def() and returns: dict,  tf,  tf,  dict,  TS,  TS