code: def __init__(
      self, eta, beta1, beta2, gamma_l, gamma_u, eps, bias_correction
  ):
      super().__init__()
      self.eta = _f(eta)
      self.beta1 = _f(beta1)
      self.beta2 = _f(beta2)
      self.gamma_l = _f(gamma_l)
      self.gamma_u = _f(gamma_u)
      self.eps = _f(eps)
      self.bias_correction = bias_correction
      self.v = {}
      self.t = {}
  
file_path: nnabla/python/test/solver/test_lamb.py
imports: import pytest
  import nnabla
  import nnabla.solvers
  import numpy
  from solver_test_utils import solver_tester, RefSolver, MixinWeightDecayFused
  from nbla_test_utils import list_context
label_desc: Use image node_id 1 to create a new RefLamb object from inherited base classes: MixinWeightDecayFused, RefSolver with example: obj = RefLamb(eta, beta1, beta2, gamma_l, gamma_u, eps, bias_correction)