code: def invertibleroots(ma):
      proc = ArmaProcess(ma=ma)
      return proc.invertroots(retnew=False)
  
file_path: statsmodels/statsmodels/miscmodels/try_mlecov.py
imports: import numpy
  from scipy import linalg
  from scipy.linalg import toeplitz
  from statsmodels.base.model import GenericLikelihoodModel
  from statsmodels.datasets import sunspots
  from statsmodels.tsa.arima_process import ArmaProcess, arma_acovf, arma_generate_sample
label_desc: Use image node_id 5 for calling a global function with example usage: invertibleroots(ma) and returns: proc