code: def grad_beta_logpdf_arg2(x, a, b):
      return np.log1p(-x) - psi(b) + psi(a + b)
  
file_path: autograd/autograd/scipy/stats/beta.py
imports: from __future__ import absolute_import
  import autograd.numpy
  import scipy.stats
  from autograd.extend import primitive, defvjp
  from autograd.numpy.numpy_vjps import unbroadcast_f
  from autograd.scipy.special import beta, psi
label_desc: Use image node_id 3 for calling a global function with example usage: grad_beta_logpdf_arg2(x, a, b) and returns: unknown