code: def compute_output_spec(self, loop_vars):
      return [KerasTensor(v.shape, dtype=v.dtype) for v in loop_vars]
  
imports: import numpy
  from keras import backend
  from keras.api_export import keras_export
  from keras.backend import KerasTensor
  from keras.backend import any_symbolic_tensors
  from keras.ops.operation import Operation
  from keras.utils import traceback_utils
label_desc: Use image node_id 3 for calling the WhileLoop obj's underlying member method code with example usage: obj.compute_output_spec(loop_vars) and returns: unknown