code: def print_dparams(self, dparams_est):
      OUT.write("AR coefficient estimate:   %8.4f\n" % dparams_est[0])
      OUT.write(
          "AR coefficient truth:      %8.4f\n" % self.dep_params[0]
      )
      OUT.write("Error variance estimate:   %8.4f\n" % dparams_est[1])
      OUT.write(
          "Error variance truth:      %8.4f\n" % self.error_sd**2
      )
      OUT.write("\n")
  
imports: from statsmodels.compat.python import lrange
  import scipy
  import numpy
  from itertools import product
  from statsmodels.genmod.families import Gaussian
  from statsmodels.genmod.generalized_estimating_equations import GEE
  from statsmodels.genmod.cov_struct import Autoregressive, Nested
label_desc: Use image node_id 1 for calling the AR_simulator obj's underlying member method code with example usage: obj.print_dparams(dparams_est) without return types