code: def test_multistep_lamb_high_lr(self):
      self._test_lamb(10, {"lr": 10}, 1e-5, 3e-4)
  
imports: import unittest
  import numpy
  import tensorflow
  import tensorflow_addons
  from tinygrad.tensor import Tensor
  from tinygrad.nn.optim import LAMB
label_desc: Use image node_id 6 for calling the ExternalTestOptim obj's underlying member method code with example usage: obj.test_multistep_lamb_high_lr() without return types