code: def build(self, input_shape):
      pass
  
imports: from typing import List, Optional, Dict, cast
  import tensorflow
  from tensorflow.keras.layers import Layer
  from .._backends import UnknownSize
  from .None import RearrangeMixin, ReduceMixin
  from ._einmix import _EinmixMixin
  from ..einops import TransformRecipe, _reconstruct_from_shape_uncached
label_desc: Use image node_id 3 for calling the EinMix obj's underlying member method code with example usage: obj.build(input_shape) without return types