code: def max_batch_sizes(self):
      return [shape[0] for shape in self.tensor_shapes]
  
imports: import unittest
  from tensorflow.core.framework import attr_value_pb2
  from tensorflow.python.compiler.tensorrt.test import tf_trt_integration_test_base
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 3 for calling the MaxBatchSizesTestBase obj's underlying member method code with example usage: obj.max_batch_sizes() and returns: unknown