code: def deriv4_inverse(self, phi, theta):
      th = theta  # shorthand
      d4 = ((1 + th) * (1 + 2 * th) * (1 + 3 * th) / th**4) * (
          1 + phi
      ) ** (-1 / th - 4)
      return d4
  
imports: import warnings
  import numpy
  from scipy.special import expm1, gamma
label_desc: Use image node_id 9 for calling the TransfClayton obj's underlying member method code with example usage: obj.deriv4_inverse(phi, theta) and returns: d4