code: def backward(self, value, *inputs):
      return pt.softplus(value)
  
imports: import warnings
  from functools import singledispatch
  import numpy
  import pytensor.tensor
  from numpy.core.numeric import normalize_axis_tuple
  from pytensor.graph import Op
  from pytensor.tensor import TensorVariable
  import pymc
  from pymc.logprob.transforms import ChainedTransform, CircularTransform, IntervalTransform, LogOddsTransform, LogTransform, SimplexTransform, Transform
label_desc: Use image node_id 1 for calling the LogExpM1 obj's underlying member method code with example usage: obj.backward(value) and returns: pt